ShoulHe been curving me.....mostly We act like friends

So to start off me and my boyfriend been dating for about 4 years now. He basically lives with me because his job is near my house. My mom is fine with that because I’m 23 and he stated to come over around to my house 2 years ago. We laugh, play games, watch movies, we cook together. We don’t really go out or take pictures I kinda what to go out and take album worth of pictures but that’s another situation. The only thing is we don’t have sex. The last time we had sex was in the summer of last year. I can count on my finger how many times we had sex in 4 years and it only 5 times. I had a miscarriage last summer as well. We was both scared for a while and that’s I understand and I found out he was cheating last year to around my birthday. I forgave him but, now I just feel like he curving me. He talks about having kids with me, I’m his wife then he flirts with me ,but then when I try to give him hints and flirt back with acceptance into having sex he seems to skip it, smoke and fall asleep. Ik he tells me that his sex drive is not there but he 22 . So I try other things I bought a sex toy. He seen it and was like really, I try sexy bra and panties sets to set the mood to but it’s like oh. I try everything. Then my mind is telling me that he maybe having a sex with another other girl. Don’t get me wrong or call me stupid but I feel like I trying my all and trying not to give up ,because this the longest relationship I been in that’s not long distance. He the first person I had sex with. I’m not trying to have sex all the time in a relationship we talk about that ,but I just want to be touch here and there and he not doing that. Plus on a little bonus I just had surgery like 3 weeks ago. I had my gallbladder removed. I’m still sore, but my sex drive still kicking but it’s like I’m getting turn down. I know I’m beautiful, but it hurts emotionally and I just keep thinking to myself. What am I doing wrong. Maybe It’s just me and I should have a seat.