Endometriosis is ruining my sex life. TMI

My boyfriend knows about my endo and he’s very supportive and tries to do the best he can in helping me but I try to not let it get to me which means I do shit I’m not suppose to do. Tonight, my boyfriend and I had sex and the pain was extreme. Worse than normal. I started cramping from the moment he put it in. After we were done, I curled up in a ball and cried a bit in pain. I didn’t want him to see Bcs I didn’t want him to blame himself, it’s not his fault. I feel horrible. He should have to deal with this, he shouldn’t have to be with someone who has this. I just wanted to rant a little bit. I don’t know how else to ease the pain