Leave him be.
You really sound needy and desperate...maybe into him more than he is you.
Change is inevitable. Life happens, and things will not always remain the same as perhaps they once were.
Just because you two have had these types of discussions, doesn't mean that either one of you will follow through as promised. No one knows how they will respond to a situation until they're exposed to it..until then it's assumptions and hypotheticals.
For whatever reason, he's not responding.
You aren't entitled to a response, nor to know what's going on with him.
According to you, he's done this several times in the past.
Send well wishes into the universe, and move on. Stop being a doormat and letting him come and go as he pleases...disrespectfully.
Move on. He doesn't respect you, and you have given him too much power and control...and you seem overly invested than what is needed. Imo there isn't any benefits to continuing this with him.
Billions of other single available respectful men who would treat you well and communicate with you. .pick one.
Perhaps it may not be best for you in the future to continue having casual relationships..