Best of luck with the speed dating
*@SpringlikeBunk*! I'm very tempted to try this too although I think it's a lot harder to get for my age range. I think your tactics sound good... the last time I went speed dating was at least 25 years ago and it was all a good laugh - I don't think it amounted to much but I do think you are likely to find more 'normal' characters in general, as people are actually prepared to meet face to face!
@user1471553350 - so many of us have been there. It really is ALL about him, and not about you - make sure you don't fall into that way of thinking that if only you hadn't said X, or done Y, that this might not have happened... or that he isn't the kind of person who'll go on to do this to the next person - because people who are cowardly like this, as @Thisisworsethananticpated said - they are poor communicators, they are conflict avoidant, and they are frightened of what will happen if they face up to the reality which is that he has changed his mind.
We are all allowed to change our minds, and what has happened here in that changing his mind, he has revealed a part of his character (weak, cowardly) that you do not want in your life regardless. I'm speaking to myself as much as you here, as I have effectively been ghosted since having my date cancelled with half an hour's notice on Thursday.
I think people like this are like those people who come round to view your house, and stay for ages, and make all the right noises about where they'd put their sofa, and how much they love it, and isn't it just the most charming place ever... and then you never hear from them again. People-pleasers... they say precisely what you want to hear because they want approval in the moment, they want validation from you. What they are not thinking is 'perhaps I shouldn't lead them on, it wouldn't be fair...'.
I am getting better at handling these things when they happen although I'm feeling like staying on the bench for a while - I just can't be doing with all the time-wastage of it. My advice would be to delete all record of conversations with him, the chats, the call history, his number... and move on. I had one do this to me last summer and it ruined my life for weeks - he said he was having a life crisis and could I give him a bit of time to sort himself out (a week he said). Never heard from him again. This was someone I'd been seeing for a couple of months and had slept with. 