<human>: I had this whole thing written out but I am going to get to the chase here. I have been dating my ex (Mike) on and off for almost 3 years. I blacked out and cheated (not remembering) with him and lied about it so I wouldn't lose him, knowing my mistake. He chose to forgive me and we have been on and off ever since. It truly seems like 3 years later, after my mistake, I am still apologizing and having to make up for what I did. I have been so good to him, even when he doesn't deserve it. Everything else in my life has gone to shit because of my obsession with this relationship. He says awful things to me (i.e. "I am hooking up and talking to other girls" "I don't care about you" "I don't like being around you") and I put up with it. I have had anxiety for 6 years, and tonight my attacks came back, worrying about this relationship. He has a formal for his fraternity in a week, and I tried to text him to see if he was going to take me or not, and he never responded the entire day. I know he cares about me in his own way (I don't want you to think he's an awful person, just heavily ungrateful for me), but if he chooses not to take me to the formal, should I just let it go? I want to move on, but I can't ever get myself to just stop talking to him and hooking up with him. He is studying abroad in Ecuador all summer, so I may take this time to move on. Help please.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Please help with advice on a girl who truly loves a boy, but he is no good for her and it's now affecting her mental health.