People are messing with you because you have scars? That is appalling.
I'm sorry you have to go through this. ::hugs::
Dealing with the problem for two years, and not yet coming up with a solution is not a sign of weakness or anything of the sort. You have nothing to be ashamed of, and you have nothing to worry about.
The way I see it, the problem is not even that you are experiencing this trouble; the problem is that it is changing your life. Please remember that nothing - and I mean nothing is a problem that cannot be solved.
Have you tried simply talking to these people about how they are making you feel? If that does not work, or you don't wish to do that, then the answer is with you. I believe that the answer to most problems is somewhere within you, corny as it sounds.
Now I don't know the full situation, so I can only imagine, and generalise. But you need to accept yourself and realise that, if other people can't accept you too, then they aren't worth bothering with. Remember, nobody can ever make you feel inferior without your consent.
If something I said it unclear, please let me know and I'll rephrase it.
If you wish to talk to me anytime, you're more than welcome to do so.