How do you put up with winding up from little shits?

I'm 15 and I get round up by little 13 year old brats. For example I gave my friend money who is 13 to buy tobacco because I wanted him to stop winding me up but he carried on so I just went home. But now on Xbox live they are winding me up and they know I can't hit them because I'm 2 years older than them and I get so much anger and hate in my heart and I find it hard to let it all out. I really hate these little turds. I wanna do something but I'm holding it all in what can I do?