I don't know, I mean if they are bullying you then just tell someone, but it could also mean they like you? Maybe? If they are you're friends then that's normal sometimes, but if it is really affecting you and they are being jerks about it then tell somebody.
Are you a girl if you are it might be because they might like you, or if your a boy they might be jealous of you or just want to bully someone, don't beat them up or anything maybe just say something like "leave me alone" or tell a teacher or an adult they will handle it.
