Because I know in my heart, you are the only one for me.

因为我很清楚在我的心坎里只有你的存在。

youdao

Have a good day sweetheart, you are the only one for me, I'll never consider going back to her, and everyone knows what I feel for you.

甜心，祝有好的一天，你是我的唯一。我不会考虑回到她身边并且每个人都知道我对你的感觉。

youdao

You are, and have always been, the only one for me.

你是而且一直都是我惟一的爱。

youdao