"my least favorite part of the party aspect is that split second when a hot guy tells you that you look pretty but it doesn't really mean anything because he's not seeing all of you, and you know that he would run and hide the second you took off those tights"
Story of my life. Except that I'm hiding my back, thighs and upper arms, not legs. But I know exactly how you feel. I feel like under my clothes and make up, I'm ugly.
But I had a lovely boyfriend when I was 16 who never commented on my birthmarks and gave me a lot more confidence about them. One day you'll take off your tights for some hot guy, and he'll be so into you that your birthmark wont be important to him. Even better, you'll find someone who loves it, because its part of you. Best of luck
Now back to facebook for me too!