Why do i feel the need to not listen?

So, Ive asked and reasked if i did the right thing and reguardless of the answers, I got back with her. Well guess what… It worked for a night, and it was a really great night, but now shes back to the same basic stuff. She hasnt hit me or anything, but she still as no desire to do anything, shes failing every class shes in because shes too busy trying to text me in school, or writting notes and other such things. On top of that she still has no ambitions for the future and says that she wants to be with me no matter what, and all that i need you, never leave me, without you life would be meaningless and id just die, hogwash bulls*** that really is making me feel like she more of a burden than a girlfriend. Ive started to become distant and started leaving when she falls asleep ( to go run errands, do work, or even play videogames). She’s noticed this and is really harping on me. She no longer trusts me and checks up on me randomly yet rarely believes me when I tell her that im at home doing nothing because she “didnt see my car” when it was sitting in my driveway. A little wile back we had sex for the first time (her idea) and she keeps holding that over my head and making me feel like i almost forced it upon her when she was she was the one that was in contorl the whole time. Ive only recently figured that it was only becasue she wanted me to feel almost obligated to stay with her. were going to prom tomorrow.

so my question(s) are…

Why do i never seem to want to listen to yall?
and
What in the world should I do?

(sorry for the long windedness)