Heya! Poor you, I know how this feels since I have been through this, Everyday i would come home to find a comment or post on one of my pictures saying something like " Ugly " or " I Hate you " and much worse, It may not seem like much, But it tears my heart in half when i saw these mean comments. The best thing to do is to ask them what you have done to deserve this- This can end in two ways, They either tell you what you have done wrong and you guys can make up, or they just ignore you or say spiteful things. If  it ends in the second option, Tell an adult you trust, I know you may of heard this on many Anti-Bullying websites but trust me- It works. Believe me i have been through this. 

Best wishes for the future and i hope all ends well.