There was one guy who did this to me a few times. I feel for you, and I hate that feeling of getting ready, just to be let down. There was one time the guy cancelled because it was a legit emergency, but the few other times were not good enough excuses. Then, when we broke up, a month or so later, I gave him another chance. Well, it was the wrong decision, because a leopard does not change its stripes. He said how much he missed me and made plans, but then a few days later when the day came where we were supposed to go out, he ghosted me completely. I was very hurt by this, and it was a wakeup call. I now see that he is a selfish narcissist and that I gave him too many excuses. Live and learn. When it happens once, shame on them....twice, shame on me, like that saying. I do realize my self esteem issues played a role in me making myself too available to this person who did not deserve it.

My advice: do not even contact him at this point. If he reaches out, apologizes, and plans to make another date...well, then it's up to you whether to give him one more chance. However, it sounds to me that this person is not worth your time, and it's a red flag that he cancelled last minute unless it was an emergency or he was sick (even in that case, I'd be on guard to see if he is consistent, or is he a flake?). I'm sure there are plenty of people out there who are consistent and are worth your time, so it's likely not worth it spending another minute on this person.