No need for a new thread. I agree his behavior is confusing, which probably indicates some ambiguity about the break up. Or it might not--none of is are mind-readers so we can't say for sure.
But what really matters here is not HIS feelings about the break-up, but YOURS. Spending a lot of time and energy trying to figure out if he's done is just letting him live rent-free in your head. The question is, are YOU done. If you can answer that for certain, then you will know what to do in the event that he does or doesn't come back.