struggling with felling pathetic

I am just about to go out to meet my friend dressed as Dorothy, but I am struggling. It's hard not to see what I look like in a mirror, and think "Who the heck do I think I am fooling? I don't look like a woman, I look like a bad joke, a man in drag pretending. I wish I could turn off that "tape" once and for all. I fear that as long as I hear that message, I am not going to make real progress.