What's wrong with me?

So I've been wanting to have sex with my husband but he shows no interest in wanting to do it. Which I find weird because he would always want to do it and if we didn't end up having sex he would at least touch me or tell me he wants me and lately he hasn't anymore. I'm assuming he's taking care of it himself when he uses the bathroom sometimes? Because he goes to the bathroom farthest from our bedroom like if he doesn't want anyone to hear anything and he takes a long time. Idk what to do but I feel insecure about myself and I can't get turned if I do it myself but I'm sure he can and I don't like him doing that if he is doing it what do I do???