MJ,
I am ashamed of you! I have attractive, pretty friends too and you are definitely one of them. I think much of the "prettiness" spoken about here is internal to each of us, how you feel about yourself, not how others see you physically. When you glow with confidence of who you are it is recognized by all those that see you and it doesn't matter your gender. There are many fat, ugly, deformed, disabled, buck-toothed, flat-chested, skinny people in this world and they can all be pretty if they choose to be.
Assignment: Tell me at least three things that you like about yourself, three things that in your opinion make you an interesting and attractive lady.