Welcome Back Juice,
Yes the change is even harder, I understand. I want to encourage you to put that makeup on, but I'm not going to push it as I know how hard it is.
When I was in highschool, I was quite good looking but I didn't know it. I should have, as I always had a car load of girls.

But I would look in the mirror and curse myself as I saw me as so ugly. When I look back at pictures of me from that period now and could see that I wasn't.
Now as for you, I'd be shocked if you didn't have a few guys wishing to be close to you and when you're grown and 20 years from now if you run back into them, I suspect you'll find out you missed a lot of oppurtunities. How do I know? I'm in contact with some of the girls from my high school days and they "wanted to smother me in kisses."
There was Wanda Westmorland. Eveyone thought she was so ugly and I couldn't figure it out. I thought she was pretty. She was a little skinny but that long blonde hair was awesome to me.
Then one night she showed up at the skating ring I hung out in Middle School and whoa, she had make up on, tight jeans, tight shirt and she was NOT ugly, now it was cool to be seen with her. I was wishing I had acted on my first own original opinions rather than what everyone else thought was cool. That's really hard at your age and even at ages above yours. But twice as hard in HS.
But it sounds like you don't want a boyfriend, well I'm assuming you're into guys, if wrong substitute your on preference. That you do, but the fear of getting there are too strong and prevent you from getting there?
You know, you're young, you could "grow out" of this. I say that because the girl that recently told me she thought of me every night when going to sleep and watned to smother me in kisses. Now she's very outgoing. I'm not but I've imporved.