<human>: I've been with my girlfriend for almost a year and half now. The first 4 months were great and everything was really clicking. However, after that point she became very demanding and verbally abusive. At this point I've been told "I've been put into her life as punishment for her cheating on her high school boyfriend." Additionally, almost every single day she reminds me of how much of an asshole I am and "the most selfish person she has ever introduced into her life."

For some reason though I just can't seem to get away. I know this relationship is extremely toxic and it's severely hurt my relationship with my family because they constantly see how upset I am. Because of all this, I have also started drinking more regularly. Not to excess, but just more often.

I think the issue is I just don't want to hurt her even though being in the relationship is hurting her as well. There isn't a day that goes by that we don't have an argument that blows up into her continually name-calling me. 

Can anyone offer insight about how to do what I actually want to do and make myself happy again?

Can you summarize the given text in a few sentences?
<bot>: I can't seem to muster the willpower to exit a relationship that has given me mental issues and giving me anxiety attacks daily.