Why does everyone hate me?

Lately I have felt very unwanted and lonely. I mean, I was talking to someone I have known for a long time on chat. He ignore dme for two days. Now today all I said Was "Hi :)" and he tells me to go away. I was like what have I done? Also allot of people have been deleting me on facebook. Even my own COUSIN! I am a very kind girl and have not done anything to upset these people. Do you think people have been spreading rumors about me? Because I know this one girl who absolutely hates me, and starts rumors quite often. So what shall I do? Why am I being hated and the moment?