Well, most of the comments above, seem to be erm, stupid?
I mean they COULD be true, but thats a bit pessimistic.
He COULD just be a control freak. Which isn't a bad thing. I am a control freak, and I like to be in control of everything. Which obviously isn't going to happen.
However, what if he is just afraid of losing you?
He may be insecure, and might be "boxing above his weight", and be frightened that someone else could easily take your eye?
I'm guessing he'd say that he trusts you, but doesn't trust other people? Especially other men.
Has he cheated on a women before? I mean, if he has, or been unreliable in any form, he will know that men will lie to get with girls, and can put on their charm and get what they want.
Hope this helps.
Want to understand the forum rules about putting links in your signature?
RTFM, fool.