Friendship broken

Our friendship for 3 years is broken like that only..i am so sad for it..dunno why we will became like that..she my best friend and our frendship are broken like that only..if was really bad..we are not talking each other and when we meet we just no and not talking..izit my fault make her hate me?i also dunno..haiz now i always with choon hui everyday.. i not like her but if i not with her will no body lunch and walk wif me..i not many frend if i got also we also not so close sometimes i m jealous with them cuz they always talk and i m de one who sitting doing nothing..i feel very of this problem..