1.I know you are here and receive(receiving) my message.
2.Why do not reply to me.
Why not reply to me?或者 Why don't you reply to me?你为什么不回应我?reply to 回应,这个没错
3.How do you think?
有错吗?假如有错的话,应该是：
How do you think about it
4.you don't know how happy when I saw your Q-zone.
you don't know how happy ( I was ） when I saw your Q-zone.
5.Perhaps some memories do not move it better.
这句话我没看明白啊,不知道是不是想表达这个意思：有些记忆不去动它更好,那就不能这么说,而是：Perhaps it's better for some memories not to be moved.
6.I wish you happiness forever.
I wish you are happy forever.
或者：I wish your happiness forever.