I have no friends?

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I recently started a new school and I think I have no friends. Everyone there thinks I'm annoying and weird. (The weirdness is just an act because at the beginning I'm always really shy so I try and be weird to make people laugh but then i guess it got a bit out of hand) They make fun of how gullible I am when I trust them with things and they think I'm annoying because I try and make new friends by hanging out with them and trying to get involved but then I end up being called a 'scrape' constantly. They really started hating me when I started hanging out loads with this girl who I thought was a really good friend (actually she was just talking about me behind my back) and I realized that so i tried to change and I was as nice as possible to everyone and spread more. But still that isnt good enough for them so they trick me into thinking this theatre trip is really smart so I dress up smart and they're all in jeans laughing at how gullible I am. They go on my instagram page in front of me for no reason what so ever and say bad stuff about all my photos and not one good thing was said. Everyone is so two faced here, one minute i though I had friends the next minute Im dumped to the bottom and everytime I try to talk to them about it they're really blunt and make me feel stupid. I'm not academically clever but i guess socially im stupid. Should i change? I cant even remember what my real personality is! What doesnt help is that my family dont even get on with me at all.plzhelp
They are all nice to me by them selves but then when they're together they lash out and I just can't face it any more and I really did try to stop being 'fake' and weird and annoying and spreading out but they still treat me like ****.