I can't remember specifics anymore, since it's been a month or two since I finished the game. Still, it just seemed like an awful lot of his in-camp dialog was way too touchy-feely for me. It COULD be attributed to just being reallyreallyreally good friends, but I still think that's a stretch. Maybe we played different races/classes though, and he responds differently? I was a human noble warrior, a combination Alistair would probably feel quite friendly towards.