@laughoutloudt Just because he was not available those two dates did not mean he no longer has an interest in you. Sometimes things are as simple as people having prior engagements.
You could have said to him when are you next free then or let me know when you're free and put the ball in his court, instead you've allowed yourself to come across as clingy and needy.
You evidently want things to move fast, not everyone is like this. You two are still getting to know one another and he's not using you as a booty call either it seems. He came out of a relationship, did it not occur to you he would not rush into being exclusive quickly?
You're reading into things far too much at such an early stage, it does not need to be this difficult.
Anyway as I mentioned before, you are probably better off with someone who wants things to move as quick as you do. The fact this man is able to control your mood so much without even being exclusive is strange, it again shows you are being needy.
He messages you some days a lot some not so much, that is normal as some days it's easier to message constantly and others not.
I'm rambling on now, but I do think you come across as needy and it's something you should work on before you go on further dates. At the beginning stage it should be relaxed and just fun to get to know one another better to see if there is any potential.