I love my girl but I don’t think I want to live this life with her

My girlfriend and I have had our issues of course. She’s angry sometimes, yells, slams things, takes me out of character. I’ve worked hard on my mental health and when we met things were great until we moved in together. She changed. She became different and not so loving. It seems like the love comes with conditions. It brings me back to my childhood truly and I think that’s my fear in it. She has an almost teenage kid who’s autistic and just hard. He’s mean and disrespectful and doesn’t care what anyone says truly. I do love her and what we’ve grown but the daily life is hectic. She’s a business owner and it’s always go go go and more go. I’ve left twice now at this point, and came back because she makes me feel so bad for even wanting better. The first time I left some of my things were broken. The second time I left was about 2 months ago. I moved into her home and was given half the closet and one drawer. That’s still what I live out of. Idk. I feel like leaving is hard but at the same time it feels like I’m not fully wanted.