I'm 18 years old. I met this girl named Kristina at a party, our interaction went pretty well. I than added her on facebook, shot her a message & then she began chasing me. It started with her investing in me. I didn't try to get into long text conversations with her, I instead told her to call me at night & so she did. I tried to set up dates with her, she lives 45 mins away. She claims to always be busy, & works 3 jobs. Her interest level seems to have gone down dramatically after three weeks of talking. She's cold in our text conversations & not very warm. I'm wondering should I persist or just give up?