Husband is too tired for sex?!

I’ve been really turned on by my husband lately and I really just want him to throw me on the bed and rearrange my guts but he just wont! I know he loves and desires me but I just do get why he won’t have sex with me! I feel like I’ve tried everything to get his attention and he acknowledges it sometimes but he doesn’t do anything about it. I even put on a sexy dress and STILL. He will even get hard for me and then proceed to tell me that he’s too tired... I know he’s not cheating cause I go through his shit 24/7 and we’re together always too. What could it be??? Can anyone give me ideas of what I can do to seduce him???!!!