You're great/terrific.
你好棒/好厉害。

I admire you.
我佩服你。

You're really cool.
你真酷。

You're amazing.
你真了不起。

You're awesome.
你真了不起。

You did a great job.
你做得很好。

You really impress me.
你令我印象深刻。

You mean the world to me.
你对我来说是最重要的。

My heart belongs to you.
我的心属于你。

You take my breath away.
你让我忘记呼吸。