Briefly and terribly, he wants to be jealous of her, wants to pout and sulk and refuse to talk to her. Even as self-centered as he can be, he knows that's not right, that it's not fair to one of his oldest and best friends. The really awful thing, though? It's not knowing that it would be wrong that keeps him from taking his hurt feelings out on her.

It's knowing that if he did, someone would know he's actually sad about something, and he doesn't know how do deal with that.

"Yeah? You've got some help planned out? Could be fun, I'm totally in if you need me!"

That way he can keep an eye on things, if she tries to set him up with someone. It's better than nothing, right?