Take control of yourself. You say yourself that he's "emotionally insensitive", "not worth it", and "leaving soon anyways". Everything in the world that reasonable is telling you to not do it. Look at it from the other side: "Why should I approach this guy?" Are you going to betray all of your cognitive faculties, just because you got a "feeling"?

If so, go ahead and get used; it's not like you're worth anything anyways right?