Uhoh! friend crisis!?

2 of my best friends at school started acting all mad at me on monday for no reason, and they've been acting mad at me all week and dissing me and they are throwing a bonfire and dis-invited me. also, when i asked one of them what was wrong she just called me a snot and then stormed off! what is going on? and apperently im the one who was being the snot and had the attitude problem or so they say. and i wrote to one of them on here saying that i miss hanging with her and that i needed to tell her something the next day so the next day she came up to me and said," so were you going to tell me something or is this just another one of your stupid jokes?!" what? what is she talking about? is someone telling her something behind my back? and another thing, this girl that has nothing to do with the problem came up to me and said that was i was being selfish and self centered and thats why they dont like me anymore. i didnt even talk with them on monday cause they were acting mad at me.