The response may vary depending on the individual, but many men will feel a twinge of remorse within a month to six weeks of breaking up with you. Dumper's remorse, as I refer to it, is palpable. It occurs to almost everyone who ever dumps someone. The feeling of remorse is natural. After all, you did something very selfish by dumping someone without giving them a chance to change your mind. You should feel bad about this act. However, just because you should feel bad about yourself for dumping someone doesn't mean that they will always forgive you. Sometimes people need time to heal their wounds, and in order to do that, they have to move on with their lives. If you break their heart, they might not be able to reach out to you anymore. If you want others to believe that you are sorry for dumping them, then you should really be sorry. But also remember that they were never really yours to give in the first place. Healing from a broken heart isn't easy, but it is possible. The more you give yourself time to recover, the faster you will be able to move on with your life.