How long does it take for the "dust to settle"?

Anonymous
ex broke up with me 3 months ago. this is the second time I've gone no contact and its been 3 weeks and counting. he has told me he is happier, that we will never be together and so forth... (there was a lot of anger from him, but the last time he told me all this he seemed "calm" and "mature" about it...don't know if it was an act though because it was over the phone)

i've been reading a lot about people saying that you should "never say never". that at the time, the "dumpers" believe that they really will never be with you again and that they really do feel that they no longer love you. but once the "dust settles" they could have a completely differently outlook. that no one, not even them, really knows what the future will hold.

so...how long could it take for the "dust to settle" or for them to realize that they really didn't mean what they said and what you back?

any personal experiences where you (the dumper), truly believed you would never be with someone, only to get back with them months or years later?
How long does it take for the "dust to settle"?
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