Always bullied

I've been bullied since I was 13. I'm 21 and people still make fun of me. That's supposed to stop.

It was constant, and depressing. I'm shy, but not weird or strange. I'm just not pretty.

I had and probably still do have a poor self image. I've two stunning sisters, and I got the short end of the stick, badly. And I don't bother to even try to look nice at times, I mean what's the point. Nobody notices anyway.
I can just about pull off nice/borderline pretty when I dress up and make up to go out, and all that, but the rest of the day, people just constantly make fun of me.

It gets to the stage where I can't seem to trust any of them. When I go out (and that's a rareity, but when a guy comes up to talk about me, I'm waiting for a bunch of his friends to come out from behind a corner and laugh in my face.
People I pass at the shop would call me, just call my name, and make fun of me, stick up their middle finger at me.
I'm like how do you know me, I don't know them, how do they know my name, what? There's the freak? Everybody knows it?

I never go out, I've two friends who have bigger groups outside of me, I'm always a second thought.
I used to play loads of sport, I loved it, it's the only time I've ever felt confident or happy, but since I've left school I haven't joined any teams because I've no friends and I find it very hard to fit into groups.

Boys don't notice me, my friends are gone, I've never felt so alone. I feel like I'm disapeering into a black hole and nobody would notice if I was gone. I've never felt so alone. People say it's supposed to get better when you leave school, I'm nearly 22 for God's sake. When will it stop.