sadly kids do this. and it is not nice. i would try and hang out with some new people. sounds like it has got you down, so, maybe a chat with your school counsellor is needed. he/she can help you with ideas about
friends and why some do what they do. don't beat yourself up ok. you have been brave in posting, keep being brave and seek some help. with healing compassion,
-jamie
ps yes a big YES to talking with your school counsellor!!!!!!!!!!!!!!!!!!