Friends and boys blues

I have liked this boy since yr 2 and I know I say guys are jerks but thts only because I get scared if I like 1 they wont like me back and this is why… my mate and I were quite close but recently shes been a real BTCH I told her a yr ago I liked this guy and recently say how cute he is but a few weeks ago she turned round and said to me “I like him too so back off ok” I resppect her liking someone but I said to her why do you if you know that when you go out with him you will hurt me??? she said that she didnt really care and punched me…things like this happen all the time with her and its tricky because if I stop being her friend I will be with her all the time anyway because we are in the same form and same group of friends this is really getting me down along with a huge stomach ache like cramp does anyone know wht this cud be its like im being punched lightly then every now and then hard…this boy doesnt like me back but only as a friend im worried he will 4get me when he goes out with her am I being melo-dramatic about this or was it an ok couple of questions to ask :S xxx