>>2 Believe it or not, not ALL people want sex out of a relationship.
>>3 I don't think anyone would take online advice telling them to have sex.

I think if this person is causing you physical or emotional harm, you should just back off. You have mentioned that he is manipulative, and ,from what you've mentioned, I'd have to agree. Weather it is romantic or not, this kind of relationship isn't healthy and isn't doing anyone any good in the long run. Please correct me if I'm wrong, but are his redeeming qualities worth withstanding any kind of relationship with him if it is causing this kind of pain?