Edit (Moderator): Moved to relationships.
Have you ever been so infatuated with someone that when a chance came to actually talk to her, your brain just completely shut down, leaving you a speechless, blithering moron?
I was just remembering a time in college when I had this crush on a girl in some class I had. One night I saw her out at a bar, and my friend knew her. So he went over and told her that I had a little crush on her. It was a huge crush, but he didn't want to make me look like a total nerd. I told him I wanted to meet her, so he comes over with her and introduces us, and I said something like, "hi." And then she said something like "hi."
And then we stood there. I had nothing. I was just blank. Total emptiness in my head. I could not think of one thing to say, I was just so amazed that she was standing there in front of me. This silent stand-off lasted for at least thirty seconds (although at the time it felt like about a half hour), and finally she walked away, obviously uncomfortable with the awkwardness of the situation.
I never talked to her again, but after she walked away, my friend turns to me and says, "I think she really likes you!"