College changed my girlfriend so much. I don't know what i should do

I've been dating this girl for 1 year and a half now and i love her to death. She's the girl that i wanted to spend my life with, she's cute, smart, quiet, loves to read, innocent, beautiful, perfect. Once she got to college though, it seems like i'm only liked for what i represent, not for who i am. She'd rather go to parties instead of spending a night together with me, she'd rather stay at her dorm than be with me at my apartment. the only times i see her now are on campus when we may get to have lunch together a couple times a week, or when she's wasted and using my apartment to crash. she tells me every day that she loves me but i don't know if i can believe it. I feel like she loves the idea of a boyfriend instead of actually having one. we haven't been on a date in ages because i dont really have the money. she's just not the same girl i fll in love with, It slipped out today that she'd rather party with her friends than cuddle with me. she took it back immediately but... i don't know. all we ever talk about now is her floormates getting drunk and partying with her now, and i feel like she's getting more distand and she's feeling like more of a stranger. over the last 3 months we've also been gradually getting less intimate. over the summer we cooked together, took care of the house, watched movies, held hands, hugged, made love a the whole 9 yards. now she wont even kiss me unless i ask for it. what should i do? i can't being myself to break up with her, i love her to much to see her cry, but at the same time, i spend my weekends waiting for her to come back from her parties, spending hours at a time worrying about if she's ok, if something happened ect.

Well this is the exact same story all of us have been through in our lives. Theres really not much you can do....its her life. Why have you decided to settle down at 22 years of age? Thats kind of sad from my perspective