好久没有看见你了，你在做什么啊？英语怎么说？

最常见的问候语。

havn't seen you for a while, what have you been up to?

long time no see 挺好的呀，为什么不要。。。

It has been a long time since I met you last time. How's everything going?

好久没有看见你了，

Haven't seen you for ages

你在做什么啊？（其实是问近来怎么样啊，等）
how have you been?
how's everything?
how are things going?
Anything new?

其实还有很多说法，看你怎么理解罢了，呵呵

I haven't seen you for a long time. What are you doing now?

Haven't seen you for a long time. Is anything new?

long time no see, what r u busy with?