I think there are many of us who can relate to being bullied about how we looked. I had it constantly from almost as young as I can remember.... But you don't look as they were saying. I've seen pictures of you and you're really pretty. The way you speak about yourself makes you sound like some kind of ugly "freak" which you certainly aren't!
Glad that they've been talking about mh at school... Hope it helps them to understand - have you actually sat down and talked to them about how you feel? Actually said how things are? Not to scare them, but actually you tend to find that those around the person who is struggling with their MH think that there is much, much worse "causing" their loved one to be struggling - therefore it's better to talk openly and honestly... .