Which one should I ask?

Honestly none of them sound very good. A sounds like he won't even be talking to you much of the time. B sounds nice but kinda not cute. C sounds like you'd make your friend mad. D sounds like a player/loser. And E sounds kinda too mature. But....I'd ask E. If he says no, Then i'd ask B:) Get to know B a little more though so you're comfortable with your choice. Good luck.