In my opinion, people might be making fun of you simply, because they are bullies and think that you cannot stand up for yourself. People mostly pick on people who are shy or do their own things differently from the crowd. Do not be discouraged but find friends that like you for who you are. If it's serious, you can report the matter to an authority.
Some people like to hide their flaws with someone else's flaws , well the only way to shut them up is by facing them ... If you cannot do that , go ahead and point out their flaws .. If that won't do , Go and ask someone for help whether its a teacher , student , parent .. Anything but the best way to make them look like losers : ACT AS IF U DONT HEAR THEM and what mostly makes them look like losers laugh and say omg ur so pathetic hhaahahaha
because they are simply unsatisfied with their own lives, don't change yourself for anyone. you'll find the right people who love you just how you are and everything will level out sooner or later, bad things have to happen for us to appreciate the good things =)