Ahhh!

I just found out that my crush has a girlfriend!!! WHAT SHOULD I DO

how serious is it? how long has be known this girl? or dated her? and doesnt he know that you like him? you could do more if he knew that you liked him...

that happened to me too once, I found out that my best guy friend was engaged once right when I was flying across the country to go see him- he wanted me to come, we have been close for many years, and off and on with liking each other...and then suddenly his fiance just cheated on him and now it is off...so I know how ya feel...

Just act normal around him- its hard to find out that your crush has a girlfriend- there is a slim choice of things that you can do...dont try and break it off, he will figure out soon enough if he should be with her or not...

You do absolutley nothing to meddle with their relationship.
Move on

forget about it

take her out now, while you still have the chance