I suddenly feel lost with my feelings

I know y’all gonna bash at me but I don’t know if it’s my mental illness making me feel this way or it’s true feelings

I am dating a man and we just moved in together and I just suddenly feel lost interest or whatever. Like I just feel want to be alone and he treats me pretty good but sometimes we argue . I was single for a year with an ex who was abusive as hell and I gotten into a relationship with him and it is better than my ex’s yes but I just suddenly feel different vibe and scared. He was in other state and we knew each other couple years before but started talking and that’s how it went down. He moved here for his family and I .

Please be kind to me I’m in a vulnerable mood now.

I talked to him that I need to focus on myself mentally and I don’t wanna cuddle or sleep together cuz I need space and he just upset and I’m not trying to hurt him at all. I just feel so pressured and stressed. I just what if it comes back and I regret it or it’s true . Damn I’m so angry at myself and the world now.