Just like the title, I had someone cancel on me 3 hours before we were about to hangout, they asked to reschedule for tomorrow and I took 20 minutes trying not to write an annoyed or irritated message, just kinda neutrally said it was fine and asked for what time. Its been over an hour and they haven't responded I'm splitting hard, I literally just met them last week and we have only met-up once but I was so excited to see them today. Today was PERFECT, tomorrow is inconvenient and frustrating. I spent the whole day looking forward to it after having a fucking awful day at work and had just gotten out of the shower and was trying to figure out what I was going to wear.

I'm wavering back and forth from being pissed off at them and hating myself imagining they just don't want to see me, does anyone have advice for dealing with this?