Most Helpful Guy
Nothing wrong with you, everything wrong with him
Most Helpful Girl
I suggest that you wait until tomorrow and see what happens. When he contacts you, if he doesn't reschedule you can directly ask him if there's something wrong, and if he reschedules and cancels again, you can tell him how you feel about him cancelling everytime.
Maybe you're right and he's losing interest, but that's not necessarily true. I'd try not to worry so much until we talk again.