Ya know some guys get addicted to porn. It may take some counciling to get things back to a somewhat normal state. I can't say I understand why a guy would rather masterbate than have the real thing but that in itself is a statement of selfishness. As Lou pointed out, you deserve more out of simple consideration. The longer you let it go, I'm afraid the less likely it is to change. Good luck, I hope he'll get a grip on reality and you can both be happy.

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As to marriage or celibacy, let a man take which course he will. He will be sure to repent - Socrates

Love is not looking in each other's eyes, but looking together in the same direction - Antoine De Saint-Exupery