Sex after baby

My LO is 5 weeks old. Dad and I haven't been sexual in any way for at least a month prior to her being born. Dad is having a hard time understanding that I would rather sleep than give him a BJ or do anything when LO is sleeping. I feel bad, but I'm not feeling attractive or wanting to be touched at all. I have a very low sex drive to begin with, and now I have none. It's putting a strain on our relationship. :(