I know this is stupid... but could somebody please help?

For a start..... this ISN'T your fault. You are a human and can lose your temper (so can i) I am so sweet and shy but if someone pulls the wrong string-SNAP i go. If they are being like this, my advice to you is just let them go, don't bother with them because they are not real friends and are being immature. I get bullied so i know what its like to sit on your own at lunch or in the classroom. It hurts like hell! When i leave college i sigh with relief, go home and forget about them until the next day. You don't do anything wrong - this is not dumb it is a REAL problem and i'm here to help if i can. Don't change yourself - being an individual makes you a beautiful person ok! I think of everyone before myself. I would give my friend my last penny if they needed it even if i didnt have any left for myself - thats my nature. You care because thats you ok. Hope this helps and i'm here ok like you were for me. :)

Ok I dont know what exactly you are like when you are around your offline friends but maybe they dont see the real you cause you act like someone different around them or you try to hide the real you. I myself hang out with many different groups of people so im a different person around each. then when im online im myself cause i know Im not actually going to meet them and its easyer to ditch them if they dont like something. But i know how you feel with people treating you like crap. all i can say is confront them about it. If they dont listen then they shouldn't be your friends.