自己翻译的,没有语法错误,用词不当,嘿嘿,说这玩艺长大的!
Remember the times when we laughed together,encouraged each other?Although there were some misunderstandings between us, yet we are still good buddies. I don't believe that any friendship can last a lifetime, but I will cherish our friendship. I am not sure about how you think of it, but I have always thought that you are a good friend. If there are times when you are upset, you are always welcome to talk to me about it. I will be there for you, to make it all alright. I am always on your side!
最后一句不太适合用support you~ 呵呵
对了,你是他/她亲姐姐么?如果不是,就绝对不能用sister阿~就用你名字就好了:D