maybe he feels comfy around you and likes you (not nescecailly more then a friend) I mean I call female friend pet names like a lot (never baby but maybe its a cultural thing but sweety and huny I do use )
Why not? I don't believe it's anything special. I call my girlfriends (friends who are girls) things like that too, just for fun :-))
you seem to vote down any one who says he doesn't like you...
regardless at the moment it just a pet name he has given you, you can't really base a guys attraction one way or another based off a single thing like this you need to look for at least 2-3 more signs in my opinion