当我成为你的朋友时我会很高兴.用英语怎么说?

问题描述:

当我成为你的朋友时我会很高兴.用英语怎么说?
顺便帮我查点语法错误:
I'm a chinese girl.I'm 14.I cannot speak English well.Er```I'm so excited when I be your friend

I'm so excited when I be your friend
改为
I will feel glad if i could be your friend.