How to feel confident when you are genuinely ugly?

Like I know I am ugly, there is not a question about it. I have a big nose, small eyes, thin lips, and a larger shaped face. It just is a fact. Now that I can recognize it...I just don't know how to accept it.

Like I am going to a fancy dinner tonight. I want to dress up, and wear a cute red skirt with tights and a black blouse with knee high boots. I want to feel sexy and pretty. Even if I do, I just know I will step out my door and people will make me feel shitty.

More than anything it is just embarassing that I am out and people are looking at anyone BUT me. Say I try to be cute or sexy, the fact that men don't even look in my direction when I am so obviously wearing something that is meant to be sexy is just plain embarassing.