Why the fuck won't he leave me alone?

[Shana]

There's this annoying fat guy in my classes and he keeps on talking about me right in front of me. I'm the shy . quiet , mysterious type and I'm a loner...he found my twitter account and is an immature twat about it. he uses the fact fact that I have one against me and apparently having one doesn't suit my personality. Its kind of trivial but he gets on my nerves , is he trying to provoke me?
he's also read everything on my Twitter including private things (I use a fake name on my username) and he also uses that against me and he thinks he "knows" me , his friends which are bitchy girls also join in and make fun of me
They all RT'D something I tweeted months ago
Sorry if this is hard to understand , I rushed this cause I'm at school
I didn't mean to call him fat , its cause I'm angry. He brings everything up , he's a bigheaded wanker!
I am far from attention seeking , I'm too introverted to be that and I hate getting any attention , that's why I hate it when people talk about me!
I keep myself to myself. I get bullied in school and Twitter helps me express myself and I've made friends. The last thing I want is for people in school to find me
I'm trying to say that he isn't visually appealing so you lot don''t assume that I "fancy" him. He calls himself fat anyway!
I want to get away from school people because it reminds me of my friends death( she committed suicide because she lost her baby , her bf was unsupportive and abusive to her and me...)

I'm looking for a solution and advice not attention!
I don't like being reminded of school when I'm at home
Why would I keep my acc private if I wanted followers?
He found my twitter account by hacking onto my blog , he's trying to provoke me caue I'm quiet and closed.
My friend wasn't slutty , she was gullible.
He is my friends distant cousin! She was an "emo" girl and he uses the fact that I was friends with her against me , he used to call her a freak cause of her differences.I'm not blaming him