你肯定不知道，我在想你，英文翻译

You definitely have no idea I'm thinking about you， because。。
英语经典台词 哈哈
标准的

You certainly do not know, I think you, because ...

You certainly don't know (that) i'm thinking you,because/cause...

You certainly do not know I am missing you, because......

You certainly do not know that I am missing you , because ...

Of course you don't know I'm missing you,because...