It is difficult man... Reading your last comment, I'm thinking that she was/is looking for a long term relationship, provider as mentioned above. It would be surprising if she didn't. She was investing into you by letting you stay at her place when you lost your job, perhaps thinking that you are the good provider, and even though she was open for non-monogamous relationship she was shifting towards monogamy... She wanted to settle down while she had the free hand to look around for another/better provider... As you say under (4), she didn't like much when you were going out with other girls, that simply didn't agree with her idea of LT relationship...
Most likely she feels or felt used, she thought she will help you with the promise (in her mind) that you will become a provider, but you didn't fit into her plan... Perhaps she tried to get you back again (5), so she improved the sex life and started to chase you... Then you got better job and income (6), and told her that you are moving out... She most likely felt used, thus she put out lots of guilt feelings and drama... And since she felt she had no power over you, the massive auto-rejections arrived... So you probably showed her too much power at this point, 80% plus, that's why the massive rejection, she had no say in the relationship...
As you said, she was used to lots of attention from guys, she used to party, her esteem was quite high. But her biological clock is ticking, she has baggage (children, slept with lots of guys, age), she knows that she is less and less desirable each year... You showing her that you can walk away after she invested into you is a big hole in her self-esteem, she might hate you for that, and she might even desire revenge (beware)...
Personally I believe that in order for long term relationship to work, some Betanization/Provider-ship is needed. Relationship is sort of subliminal struggle for power, we may not feel it but it is constantly there, one or the other partner is pushing for upper hand... I believe if one partner has persistent power say 70% or more vs the other partner only 30% or less, in my opinion the relationship is not healthy... One is too dominant, the other one has no space to breathe... So if a guy is too dominant, e.g. 80%, the relationship is not stable. He needs to shift the dominance lower, to levels 50-60% and keep it there... That way she feels that she has some power in relationship...
I believe that most women have amazing abilities to manage relationships, unlike us guys they can do it intuitively. At first, she will give you great feelings, great sex, she is feminine, all feels great, you feel confident, you have one of the best feelings in your life, you feel at the top of the world... You feel that you got those 90%... But then things start shifting, some women are well aware of this yet others perhaps do it subconsciously...
Once she feels that you have a good emotional connection with her and you won't leave so easily, she will start slowly gaining power. The best and simplest way for her is to gain power by regulating sex and your feelings. She starts giving you less and less sex. She also start putting out guilt feelings: You do this and I'll show you lots of love, but if you do that I will make you feel quite miserable about yourself...
Simple yet powerful techniques, if a guy is unaware he may easily lose all of his power... I don't think that most women do it in mischievous way (as Red Pill guys could think), it is simply female's natural reaction to keep the male around by controlling his behavior... If she can then control him and he does as she wants, she usually loses all interest in him and just keeps him around until she finds another guy. If she can't control him at all (yet he is still in her reach), she keeps high interest in him...
Many good guys fall to female control, simply because we were not born with brain that can manage relationships, and nobody ever thought us about relationships... We are too nice because we were raised believing that being nice is appropriate, normal... we were told that this is what men do, and indeed, many men around do those things...
Many guys go from 90% to 30% or less over some time, it could be couple months or couple years... There are stories like that here on GC, but if you look around I bet you'll find couple guys like that where you live... Just listen to the stories...
The guy then wakes up after some time and notices that the sweet and loving girl turned into a cold bitch with different personality... In worse case scenarios she is now treatening with divorce because she has lost all respect for him... He has to pay alimony and child support, he has to move out of house he paid for, he feels responsible for her depression, the whole family and friends sees him as villain, while everybody feels sorry for this innocent girl... It is not unusual that this innocent girl is actually fucking another guy(s) on the side... Perhaps the worse thing is that he doesn't even understand what has happened, he has no tools to protect himself...
He then carries tremendous guilt on his shoulders, he is depressed and bitter, he has no desire for other women, all he wants to is to drink so he can forget his screwed up life... Only if lucky he finds sites like GC or some Red Pill, which at least helps him to understand...
Blue Balls and Red Pills, Meat Valets, the same story over and over, who knows how many guys suffer out there...
That is why it is so important to keep your (our) solid frame. In relationships we can't go below 50%, it gives her too much power, and once she has too much power she loses all respect... Depending on her behavior, a guy needs to keep 50-70% of power and control. She needs to know that the guy will walk away if she starts pulling her crap... Perhaps it makes you even wonder whether there is any point to keep aiming for LTR, although it is quite comfortable to live with female, it is just a constant struggle...
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Broken relationships are difficult... It takes too much energy to fix it, and many times the fixes are not effective anyway, the hurt feelings are still there no matter what... IMO it is much easier to simply start another/healthy relationship... Another good reason why to have a solid frame right from the beginning, so the damage can be avoided at first place ...
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Looking back, I grew up as naive Ideologist, I read lots of books about heroes, I dreamed about purity, about that one special girl who will fall in love with me and then love me for the rest of her life... I dreamed about a girl who would never slept with other guys... It was like living in a fantasy world, and perhaps many times I am still because it is so much easier than reality... I grew up with a strong and beautiful frame - of a Nice Guy...
So the Reality could be quite harsh for some of us... We then swallow Red Pill, and the whole great Ideology is gone, what is left many times is just bitter Reality... The inner Realist then tells me, It is what it is, Life is neither good or bad, Life is only how you perceive it, and perhaps on higher level: Life is only the way how we chose to perceive it...
Anyhow, Good Luck, hope other guys will add their input...