That's good for you. But too bad about your parents. I have a similiar experience and for me it meant just letting go of trying to fix things. Even if I wanted to I can't change them to be better people. Or our relationship for that matter. All I can do is to deal with the effects that it has given on me and my life. :)

Also I recognize the wish to end things with your gf. I have exactly a girlfriend like that, or rather had, because I took it to the point of breaking up not long ago. And it really feels like some part of me that was caused by some deeper issue took over and became judgemental and blaming towards her. My parents fought alot so maybe it stems from there. But in retrospect I feel she had nothing to do with my aggitations at all. Something got caught up ans I attached to much to the inner complaints rather than looking at the sensation. She's perfect and maybe I can fix things with her still. But if I could've avoided it it would've been better. x) A part of it was due to me thinking like she expected me to be something that I'm not. Like this jolly always happy and social guy, and I felt tired and exhausted from being with her and like my own interests got squeezed. But as I let myself take more space, letting go of seeing to her constantly, I felt more relaxed and happy. At that point things actually worked out fine. Which also made me confused why i broke things off also since I was actually enjoying the relationship x). Don't do the same mistake as me!