He's got a girlfriend

Ok so I like this guy and I told a friend she went and told him, he didnt say anything for a few days. then today we were in class and another one of my friends was tellin everyone about aletter I wrote to her saying that I liked him he was laughing with his girlfriend and my friend about it I got so imbaressed and left the room what should I do.

oh you poor girl, tell the friend that was bang out of order, if my friends did that, I wood spill everyone of their secrets to every person who had working ears. give up on your guy, he has a girlfriend and laughed at u, sorry, but your not going to make a happy couple.
about the incident,make jokes about it, shrug it off, insult the guy by sayin stuff like-I thought you were cool, but I guess I was wrong, your a jerk after all. I wish you the absolute best of luc

thanks for the advise hes forgotten now