Not having sex w/ bf causing issues

I have not been having sex with my bf since I had our daughter (she’s 1). I went through postpartum , we were arguing a lot , I wasn’t happy for a long time I stopped craving sex didn’t feel pretty or anything . It’s been a year and we’ve only had sex 4 or 5 times this year. He’s told me that he’s horny and xyz but I can’t get there. Sex isn’t on my mind idk what is going on with me. I want to try it but every time we’ve had it I just didn’t really enjoy it . The way I felt about myself afterwards wasn’t great. I’ve tried to explain this to him but he gets upset because we’re not having sex like regular people. Any advice ?