<human>: Give me the gist of the text in a nutshell

Hey guys. Throw away account.
SO and I moved in together pretty quickly after we started dating (like maybe 3-4 months in. I know, really bad move). Within the first few months of living together, the place became a wreck. I'm talking about take out bags everywhere, left over food everywhere, dirty dishes growing mold on them in the sink, clothes everywhere, etc.
You'd have to tippy toe all the time to move around the place. Living like that made me very unhappy. I tried cleaning multiple times. Even got the place spotless on a few occasions but it would go back to normal within 2 weeks. He never really contributed to cleaning up and would always say I never cleaned up and how if he should have to clean then I would have to as well.
I was fine by that but he never took any initiative to do so and if I tried asking him to do things, he would get VERY annoyed with me and it would basically ruin our whole day because tension would build between us. 
It's been this way for 2 years. Caused A LOT of fights and just generally made both of us unhappy. He has very bad depression and just recently started going back to therapy but he blames a lot of things on his depression, which can get a little exhausting for me. I understand depression is a very hard thing to come to terms with, but he would just blame EVERY little thing on it.
A couple weeks ago I told him I'd rather live at my house because I'm just not happy being there. He said that if we can't live together then we can't be together. I love him and I really believe he's my first real love that I've had, but I'm feeling extremely guilty now for leaving. We were just stuck in such a terrible cycle that I just couldn't live there anymore.
Do any of you guys think things could ever change if given the time apart? Or do you think we'll just be stuck in our ways? Idk I just need some opinions and advice.
My birthday was recently and we went car shopping for him. And we got into a fight and he ignored me for  6 hours until I finally left and made plans with my friend.
<bot>: left messy SO because of filthy place and bad tensions that would grow between us because of the filth. Now feeling guilty for leaving.