let's go and have a drink.
that's not a bad idea. but frankly speaking, i would rather go home.
if you say so, go home and rest well. you looks pretty much burned out today.
ok, see you tomorrow.

pretty much: 非常接近
frankly speaking:坦白地说
burned out: 筋疲力尽地

frankly speaking  
If you say so.
Go home and rest well.
You look pretty much burned out today

A: Let's go and have a drink.
B: Well, that is not a bad idea, but frankly speaking, I would rather go home.
A: OK, if you say so. Go home and rest well. You look pretty much burned out today.
B: See you tomorrow.