mhm....in that situation tell him Asap. Preferably in person, Soz..mm, send a txt msg that need to talk asap lol >< Been on both sides of this sorta thing before....and heard how other times other people waited and one was left out feeling was under appreciated for a time, when all the long things could've been better and saving the other from going thru a relationship or 2 before finally saying it. But even if he doesn't think that way Back....it will ease up tension/random thots you got = WAY BETTER then leaving it to chance/not saying anything at all. E-specially if ends up getting into a relationship before can bring it out in the open. Plus, if left things unsaid a person is more prone to obsessing'n'thinking about it than if not got it out in the open earlier. I dunno why some people react badly or think people are Destined to doom a relationship if bring it up etc....when saying that to a friend just means even if Not feel the same way back...they know they can trust you even more....atleast is how I look/take it.
No....I would NOT recommend doing that.
Yes, tell him. One way or another the situation will resolve itself.
yes, unless he likes you back. Then its all good.