Need advice

Tiffany
Me and my fiancé have been together almost a year and 6 months. We never have sex I think we might of had sex twice in the last 6 months. this really bothers me because I can try he pushes me away but I catch him all the time masterbating. This makes me feel like he isn't attracted to me or something and he gets mad at me and says it just doesn't work he has a hard time well he don't have a hard time masterbating I know he does it daily. I know he isn't cheating I'm with him almost 24/7 and were only in our late 20s I don't know it makes me depressed that he doesn't find me attractive or something. What can I do? I can't talk to him about it because he gets mad. I just want to give up on it. One reason I think it might be is because he is scared to have a kid right now