FFS you haven't even been split from your ex for a year yet. It is FAR too soon to be giving this amount of focus to anyone else. What about YOU? How would you feel if, instead of sexting with a self-confessed cheat with anxiety problem, you gave all that attention, care & concern to yourself?
I dont think you are ready.
Certainly not for this specific man.
You are having to second-guess him, you are already "what if"ing, & he has told you he is not for you.If you were in your right mind, if you were 100% in charge of yourself, any of those things would have you running for the hills. Instead, you are wondering how to get him to try to make a go of it.
Here's my advice:
Take him at he word. He is not for you.
Get some counselling so that you can explore what went down in your previous relationship in a supportive & trusting environment.
Use that new knowledge to build yourself up.
Pay attention to yourself, not romantic relationships.
When you are ready, you will perceive that romance, with the right man, is fun, & simple, & you dont have to keep asking random strangers wtf this man means when he says ...
... because he will be straightforward, & you will not have to guess or hope.
Ditch Mr Unsuitable, & learn how to love yourself. When you do, you will KNOW when a man is trusty & true. Until then, you will be constantly trying to see yourself reflected in the eyes of someone you hope will value you, whether they themselves are valuable or not.
Forget that shit. Value yourself - the rest will follow naturally.