Replying to FUCK! jst give me ur opinions and help me out a little

Alright so this is probably going to be all over the place but anyway....So i have a girl who i was like best friends with but at the same time hooked up with a fair amount and last night she kind of broke up with me even tho we were never going out, im 17 shes 16 and i drink about 3 times a week and smoke a lil, she does none of that...anyway in the past i have expressed how i want to stop drinking so much and basically i have told her everything about my life and she has helped me out SO much with my problems and yesterday she was saying how she dosnt want to be there for my problems and she feels like my promises to quit drinking are empty, (which they are even tho i want to stop SO bad but i cant cause its fun AND a big social thing) and she thinks that i am kind of a burden on her cause i always ask her to help me out and i guess she basically thinks im full of shit. Anyway i couldnt stand to lose her, both as a friend or possible Girlfriend and hook up buddy, idk how to express to her how much i care about her without her thinking im obsessed and i WANT to stop drinking but idk if i should or can. Any advice on how to go about this situation would help so much
Thanks