am i just paranoid?

Talk about some bloke and see what his reaction is.

If he gets all pissy ask him why, then tell him that's exactly how you're feeling.

Well, if he doesn't get all pissy, you're right, it's probably not that good.

But if it does he has no way out and no excuses to continue behaving the way he has.

I would point out to him that he has an innability to talk about anything but girls, and see what he says. I dont necessarily think you should be worried, I mean, he's a 16 year old boy and ALL girls are on his brain, not just you, even though he may very well love you to death.

Just tell him he is making you feel insecure and see if he stops talking about them.

And he saying he likes it better up there doesnt mean he wants to leave YOU.