What should I say when a guy canceled last minute?

Anonymous
This guy and I was supposed to meet for our second date last night for drinks.
I went to the bar in the same area that we were suppose to meet with a group of friends 2 hours earlier to spend time with them before the date. Him & I were suppose to meet @9pm, around 8:45pm I texted him and told him i’m omw to the location and he sent me a text apologized that he was so busy with school work that it slipped his mind and ask to reschedule. So I went out with my friends and enjoyed our night instead. I haven’t responded to him since & I don’t know what to say. I’m all about giving second chance but I’m not sure what to say without sounding pissed. Please help.
What should I say when a guy canceled last minute?
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