Why do i feel like no one likes me?

Maybe im probably sounding stupid right now but thats how i feel. I know people who do love me and i do have some friends i know for sure that care about me but it seems that some of my closest friends just dont seem to be around me anymore. Like my friend fiona for example we used to be close friends but now she just seeems bored with me and i can tell she doesnt like me and my best friend told me she doesnt. Also my friend Carly, i dont know why but she just trys to avoid me and is always in a bad mood whn im around. And this seems to depress me and i dont know how to make it stop getin to my head.