Abbey, dont let someone who let you down get you down. He is obviously not right for you and you deserve much better.Forget him. His loss. Dust yourself down, and tell yourself that you don't mind and he doesn't matter.
Not sure if its a good idea to go on a date after a bottomless brunch.
If you have not messaged him to confirm tomorrow plans then I would send ONE message along the lines of 'hi, looking forward to tomorrow - what time are you thinking of'
You've been to a bottomless brunch before, Abbey - did you feel you had one too many cocktails? If so, as has been said, maybe put the date off till another day.