I might have had a similar problem as you did, in real life, but I feel glad It was in real-life because you get to know about them and tell someone about it, but the internet is a cruel place sometimes we can't figure out directly who it is or who does it. There are sadistic people on the server and online, they are just trolling, it has happened to me before. Don't let it get to your head. If anything those insults are just meant to make us stronger. If people criticize you, destructive or constructive, build off of it learn from them, move on and get better. Remember, we all love you especially me. 
Yours truly,
Winky

Yours truly,
Winky

[img=0x406]http://www.ec-fontaine-nanterre.ac-versailles.fr/IMG/jpg/partition_tableau_d_une_exposition.jpg[/img] Les Tableux D'une exposition - Modest Mussorgsky