I've been wanting to meet you for some time.

很久以来我一直想见你。

Could you please say it again?

你能重复一下吗？

Don't let it get to you.

别让他影响你的情绪。

I'm sorry to say this, but there seems to be a mistake.

对不起，这儿好像有个错。

I know how you feel, but there's no need to go on and on about it.

我知道你的感受，可是也没必要这样没完没了。

That's just great!

真是太棒了！（反话，用嘲讽的语气。）