Step parents

Hi all, I’m a solo mum of one. Lately I’ve been struggling with my partner(not child’s biological parent). Lately I’ve been struggling with him as he distant himself. I know coming in someone’s life could not be easy but we’ve been together for a year and a bit now. My daughter’s biological dad has ask to meet him as my partner does spend sometimes with us. Which I think it’s completely fair. Sometimes my partner would make comments like she’s not mine but wants to be called dad from her, sometimes he would be angry at me because I mentioned my daughters biological dad as I don’t know, I feel like your partner should be there for. I just mention how my daughters biological dad is not paying me for things for daughter or I say I feel lonely as I don’t feel like I’ve got mum friends and I’m going to reach out to this mum that I met by my daughters biological dad and he got annoyed at me for it and said I’m being suspicious on how I worded it. I probably worded it weirdly to him but I did that because I know how he acts when I mention her biological dad sometimes. I don’t know, I feel like I self isolate because of him and now it’s impacting my mental health as I sometimes feel like I’m not allowed to have friends and I honestly feel so lonely lately as I don’t think I’ve got friends. I don’t know if this makes sense but I feel like my brain is scattered atm