Getting picked on? or what?

Alright, this has been pissing me off lately so I need some advice. Alright I’m a sophomore in HIGH SCHOOL, 15 years old, almost 16. there’s two kids who really annoy the crap out of me, tyler and gaines. One’s taller (gaines) only by an inch or so, tyler is fatter, but shorter. I’m always nice to them, no matter what. Gaines always calls me stuff like dhead and saying I like d and stuff. He knocks down my stuff sometimes and I try to act like I haven’t cared for a while, just to see if he’ll stop but he wont. I tell him too all the time, almost got into a few fights with him but never really got THAT mad. But I’m still nice to him, I don’t call him names or anything, should I play his same game back? to see if he’ll stop? or actually kick his @$$?

Tyler is supposed to be a friend, me and my friends accepted him into out “circle”, but he’s always picking on me. He never picks on my friends, just me. which is what I don’t understand, I’m always nice to him too. I’m taller than he is, but he’s fatter, and I always tell him to stop and to quit. He’s always saying stuff like I like d like gaines does but I can tell he’s joking because he’s really cool when he’s not picking on me. he hits me and touches me a lot, which annoys the S outta me. I always try to call him out and say like stop touching me tyler what are you gay?? but he still never stops.

What can I do to make them stop… seriously.