4 months postpartum and still hating SO?

Me and my SO have been together for 6 years and everything was good before I got pregnant but once I was pregnant the hormones drove me to hate him and I thought it would get better after the baby. Then I got PPD and anxiety and it got even worse. Now I don’t even like hanging out with him because honestly I think I resent him. He gets sleep, relaxation time, free to shower/eat or leave when he pleases. I’m one exhausted momma that hasn’t slept in 4 months, works, keeps the house clean and makes meals for the family. Am I wrong to feel this way? Does it get better? Also we haven’t had sex in a good 5 months, I caught him talking to another woman and it really upset me. I know it’s because I don’t show love and affection but I just want absolutely nothing to do with it. And it’s not that I don’t love him because I do, I’m just having a hard time separating being a mom and a wife. I don’t even feel like I am my own person anymore.