Sleeping in different rooms

I volunteered to spend a few nights with my son in his room. I've been having to nap with him and I always have to get up in the middle of the night and put him back down. My husband is irate about it, but he doesn't help at night, so why should it matter? He just says "it's obviously about me do what makes you happy" and to be honest it sounds narcissistic to me. Like a problem always has to be about him.... or maybe he's insecure. I'm just tired and I don't like fighting because I woke him up to do his share of the work at 5 am.