I don't believe his story about the counseling being cancelled. You drive by and his car is there....that's the truth of the story. He doesn't want to go. He's not ready. You can't "get him" to therapy, it's his choice. He is showing you who he is...believe him.
I would offer that as long as you remain open to his texts and calls, he still has you emotionally tied to his disease. You haven't truly washed your hands of it if you are still in contact, still available to his lies and manipulation. He knows that. If you truly want to stay away, consider No Contact for now. Give yourself a break from the chaos.