What if I'm not sure if my crush is bi too?

Ok well I am bi and I have a huge crush on this guy at school no one knows I am bi except three other people two of which are gay themselves and the other is a girl. I have never talked to this guy and I asked my two guy friends if they thought he was gay, they both said yes but for different reasons, chuy who every body knows is gay is really great at reading people said the he thinks he is gay because he won't let people get close to him and is very anti social. ,my other friend who is like me and only his closest friends know he is gay says that he just has a feeling he is. and there is one other person that thinks he might be gay and that is one of his friends, she says that she thinks he might be gay because of some of the things he does (sorry thats a lot but I am not done). I don't think he is but I really hope he is. I am one of the shyest people out there and I don't usually talk to a person unless they talk to me, and this is my dillema. my friends say I should just go up to him and talk to him but I am afraid that I will choke up and that would give him the hint I am bi along with all his friends, when I walk in the halls some times I see him at the other end and sometimes I think he is looking at me but I am not sure. I try to get him to look at me so I can see his eyes because that helps me a lot for some reason, but when ever our eyes meet I look away just because I am so shy. I need help trying to find out if he is gay or bi and trying to get an excuse (don't think I spelled that right) to talk to him. I just can't stand it any more it is driveing me crazy please help.

well im not a shy person. im the type to walk up to anyone and ask a question. I think thats what you need to do. just ask him. what do you have to lose????