Weird question

Me and my partner have been together 9 years. We have a 6 year old son and a 9 month old daughter. We don’t have sex hardly but I know he is masturbating, how would this make you feel? Whenever I talk to him about us not having sex he blames me and says he doesn’t think I want it.

I know he’s not physically cheating as he is autistic and he’s not able to work at the moment so we are generally together 24/7.