这个句子有错吗?You don't how long I have waited for you

这个句子有错吗?You don't how long I have waited for you
You don't how long I have waited for you
请问这个句子有病吗?
如果有的话,怎么更改?
刚学英语,请大家帮忙看下
You don't how long I have waited for you,the road seems so long and i am still so far away from you,but i will go for you,let us go for a trip this summer