Masturbation...

Okay ladies, I need some advice, or maybe some input. My man is very, very sexual...with himself. It seems as if he's only in the mood when I'm away and takes care of himself, which means no needs from me when I'm home. I'm not talking about every once in a while...it's every single day, and he lies to me about it. I've caught him in the shower after waiting 5 days for him to want something from me. Even knowing I saw...he denied it seconds after. I already have problems in thinking I'm just not it for him in the bedroom. I do understand that at times, the urge to have that release is there and it's going to happen, but it's screwing up our sex life and he won't stop. He can go weeks without touching me because he pleasures himself enough while watching porn. What can I do?? It's killing me and I'm so confused.