I need help..please

I don't know what's wrong with me... I need help, my life is horrible, a nightmare.

Here, let me explain.

I'm 15. I have no friends since 2-3 years. I'm unable to speak to people my age. I have like.. no interest into talking to them. I feel very oppressed by going to school because all the people are obnoxious there and consider me like sh*t because I have no friends, therefore, i have no 'social power' to them, they think im weak, they talk against me all the time, thinking i dont hear, they talk like that behind me back, pack of cowards..

i cant be normal because im unable to socialize, however, my mother is pretty cool with me, and she cheers me up, shes my friend kinda. I don't think im depressive, but maybe im like in a shell unable to do anything.

Thing is i dont know whats wrong with me. i must be the only person in my school that has no friends, i dont understand. therefore, i assume i have some sort of mental problem. I looked around on internet, and found nothing. So if there's someone who knows a bit about the subject, please tell me what's wrong with me..

may be social anxiety disorder, read up about it on the net