Most Helpful Girl
I don't think it's unusual that most people feel like it's a mistake just when they were dumped. It's hard to come to terms with the fact that a relationship is over, especially if we don't want it to be over. I have felt the way you do now after most of my break-ups, but the truth is that once I was over that guy, I saw that it was the right thing to do.
That's not to say that there aren't couples who break up and then get back together because they both realise that breaking up was a mistake. But that's not the case very often.