A bit TMI?!

Putting the kids to bed tonight was easy. They actually went to bed around 7. I got in the shower, dressed up in a babydoll (i think that's what it's called) and went over to my husband. He was watching a movie so i thought we could get it on. It's been forever. Not because of me but he just doesn't want to have sex most of the time. I don't know what to do? I don't want to cheat, I've already tried talking to him about it. I feel like he's cheating. Or am i not attractive?? Has it happened to any of you?? What happened??