Do girls completely forgot an ex-boyfriends?

My question is do they really forgot their ex boyfriends and do they ever regret breaking up with them? I mean from my point of view I saw that, they firstly boost their self confidence,
then they start posting some s***t statuses in facebook about the breakup, regarding of the thing that how she was the girl with no mistakes, but the boy was with the plenty of them so he is unright for her.
If they are really over someone what's the damn point to do that?
To show to the boy that they're something more in this life? or they aren't over him?

Sorry for my English, but this is all I can do for now.
Any help appreciated!
Do girls completely forgot an ex-boyfriends?
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