Am I the problem?

Am I a bad person

So to preface, I’ve been in a relationship with this girl for 2 years, she’s in college and I’m still a junior in high school. And when we were first together I couldn’t get enough of her. I was literally ecstatic when she texted me, but for about 6 months now I don’t feel the same spark. I convinced myself it was just me settling down to the normal ness but now I notice all the things she does that drive me crazy, she wants to fight all the time about anything. One time she told me she likes fighting and gets excited when we do so we can talk and grow, and when I said I thought I understood what she was saying like we were learning together but no she genuinely meant she enjoyed when we fought. And I’ve grown up in a severely emotional abusive household my mother is one of the biggest obstacles in my life and I keep seeing parallels. Also all she ever does is text me and tell me how awful college is and anytime I have a bad day she tries to one up how much worse her day was, and anytime I feel upset and have a problem she ends up making me apologize and makes me the bad person when I have an issue and we’ve brought it up before and she said she would change that but after 3 more convos nothing has changed. And a week ago disaster struck I was having a conversation with this girl in my class (she has a boyfriend and we’ve talked in the past and there’s nothing going on between us) and I realized I haven’t had a good conversation where I feel like I’m actually contributing and not just there to be a wall to complain at in months, and I’ve tried to break things off but she started sobbing and I felt bad so I stayed and I haven’t been really happy in a long time and I don’t want to break up over text, but I’m not going to see her for a month and I can’t keep doing it but I’m scared I’ll get cold feet. Not because I really really love her, which I do truly love her but because I’ll feel bad and feel I’ll have to stay. I do love her and want to have this dream life she always talks about, but I feel we’re going in different paths and I don’t know if this is a normal feeling and just part of being in a relationship or if I should leave and do what’s best, but I don’t want to have the conversation and I feel trapped