What is this guy's motives? please help?

You seem like a reasonable girl. Just remember, you are both young, and I don't doubt that he wants to hook up with various women. . . You don't seem to want to put out for some reason or another. I'd say talk to him, don't take any crap, and I'd bet that if you give it up, he would stick with you as quickly as he has the rest. Or he has an aversion to virgins and you should go throw your hymen at some lonely ignored boy who you think is cute. Good luck.