People at school call me a "stalker" just to be mean!!!?

ok, im i 6th grade, and i am straight. i have a friend, (a guy), and we hang out. but, he has a best friend and another friend. his 2 friends always yell "ERIK!!! STOP STALKING" or "GEEZ!!! WE DONT WANT YOU TO HANG OUT WITH US" or they will tell me" we have to talk in private" and just walk away from me. i dont really have any other friends(im not that good at making any) so i have no where to turn. they laugh about it. i cant even ask my friend a question without them yelling "ERIK GET AWAY!" when i ask them why they hate me, they just say that they dont like me hanging out with them. BUT, when i dont mind them and just pretend theyre not there, they dont mind me being with them. i feel like they mean it. plus, sometimes other people come and talk and make fun of me. i want to just kick them!! (oh yeah, they tease my about being in teakwondo) can someone PLEE help! i am nice, i barely ever talk to them! please help.