A: Oh my God, he would love it!
If you are hot, he'll love it even more.
There's nothing a guy likes more than aggressive physical contact, clearly flirtatious, from a sexy girl who thinks of him as nothing more than a friend.
Put your hands all over him, run your fingers through his hair, squeeze his leg under the table - as long as it's completely platonic, he'll be thrilled!
If you really want to make him happy, and I mean ecstatic beyond belief, sit on his lap, gently caress his chest, lean into him real close, put your lips inches from his ear and whisper "I like you as a friend."
He'll be over the moon!
There's nothing a guy likes more than a really attractive woman who sees him as nothing more than a sexless, non-threatening, conversation lump. Something about the whole scenario makes a guy feel more manly.