Lack of intimacy sorry if tmi

So we've always had a great sex life with my daughter it never dried up but this time it's has completely came to a halt! I've tried numerous times and he's just bit having it falling asleep before I even get to bed or staying out late ( I've been going to bed around 8 for weeks since school started back but I'm not sleeping) he knows why I've waited up so he has no excuse but just seems to not be interested at all I feel so unattractive maybe he's getting it somewhere else (most likely in my head) but why has it just stopped I've tried talking a out it but I keep getting told sexist everything ( true) but to go from sex on demand basically to nothing is soup destroying what can I do? Has anyone else's other half been like this?