How to get rid of a mean boy??

[Beth]

Ok, do theres this boy at my school, and to be honest, cocky doesn't even cut it. So anyway, he's never liked me, I've never liked him. But at the minute, he's being really horrible. Calling me a female dog, telling me to f of every time i speak, n we've just been in a group Facebook chat with a loadof my friends n he asked why the f*** was i in a convo with his mates. He's put me down for my hobby (horseriding), joking with my friends, everything i do he has something to put me down for! He's really popular with all my friends. I'm a really insecure person and the slightest thing puts mein tears... can anyone give me any advise on stopping him without losing all my friends? Thankyou! xx