Stay and let him see you upbeat.

You need to envisage the meeting going well (for you) and ending with you in the best position possible. Confident and not 'needy'.

If you are focused on that goal then you will be fine. The only time it sways from this is if your heart takes over and you start to think about the relationship again.

Then you become disappointed when certain things arent said or there is a 'cold' comment etc..

It is not your job to think about that anymore.

Thats up to him.

Let the tables turn naturally on their own.