<human>: Hello! I made a post about a month ago expressing how hard I was trying to get my ex back after I treated her like absolute shit in the last 6 months of our 2 year relationship. I'm talking she'd leave my house crying almost every night. 

Well I finally managed to half way get her back and I'm acting the same way towards her. Being extremely rude, saying mean things to get a rise out of her and honestly, it makes me feel *good* to hurt people's feelings when they care about me.  I know this sounds fucked up but I like hurting my girlfriend's feelings. It almost empowers me. I always text her a few hours later and apologize because I seriously feel terrible but in the moment it feels good. 

What do I need to do with myself? I obviously have huge issues with myself and I don't know what to do or who to turn to. I'd really like so advice. Thanks guys.

Can you summarize the given text in a few sentences?
<bot>: I won my ex back, now back to my synical ways because it makes me feel good to hurt her, what's wrong with me?