How many times does he have to tell you that he only wants you as a **** buddy/friend with benefits before you believe him? You are wasting valuable dating time being addicted to someone who values you only because you are a sure thing orgasm.
Wake up, schweet heart.
I suggest you don't play games of going no contact hoping you'll be the one he gives up sex with all those other girls for (have you been STI/STD tested recently?) like was suggested by another poster, Just tell him that you have developed romantic feelings for him and since he does not feel the same and can't give up his sex addiction, then you're going to have to break all contact with him and get on with your life finding someone who wants you the way you want them.
Then, don't answer anything from him unless it's "I want you the way you want me" in the heading.
You're addicted to him and you can't give up cigarettes if you keep having a drag off of one.
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I'll add that it's ridiculous that you allow him to cross platonic relationship boundaries with you (like sleeping over in the same bed/****ing/expecting you to become more emotional with him/etc. when he's clear that all he wants in you is a friend. If you keep him in your life (huge foolish move if you do) then you should have stronger boundaries in place for yourself and stop allowing him to cross simple friendship boundaries on you the way he does.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion