No, No - He's not feeding you a line of BS. He wants to believe those things, but he can't his own insecurities won't allow it. He is actually the needy one.
You are absolutely correct, he has to accept, understand all this - and nobody can tell him. It doesn't work like that. He's got to learn it on his own to believe it.
Your detaching won't brake the cycle, your detaching is for you, it's for your sanity.
His detachment is necessary to break the cycle.
Now, again let me emphasize. I'm speaking of emotional and intellectual detachment of the drama, of those things that drive us crazy about one another - not a physical separation, not giving up on our R or M or whatever it is were trying to revive.
And Yes, I am feeling particularly Cocky today. Speaking of feeling Cocky. You free later? OOPS!!