If he's just interested in your for the sex, there isnt much you can do, but you wouldnt want to stay with anyway if thats all it was. Unfortunately I think he probably does have different ideas about what a relationship is, and most likely isnt compatible with you because of that. He wants what he wants, and if you arent going to give it to him, hes probably just going to look elsewhere, only a matter of time. dont give in though, its good of you to have boundarys and self respect. You should find a man that also shares those same ideas, that is with you for you, not sex or sexual type things.