Um... Happiness problems?

Right I'm 14 fancy a teacher and realise that life will only get worse. People bully me because try think I want to shag him and all, but I don't just a harmless crush. But everytime they say something like that it really drains my happiness and concentration in cl. I don't know what to do about it? And reacting only makes them laugh more which makes it all worse. It's only about 5-6 people who do this, and some of my friends who are friends with them sometimes even do it. I have no idea what to do? If I ignore them they'll throw something at me, and if I retaliate they'll laugh harder. I just want to die.