Now why on earth did you do that?  You really liked him and you dumped him anyway.  All because you found one little unimportant detail that you didn't like that much about him.  Have you tried to figure out why you did that?

Maybe it was the way he walked.  Perhaps it was his laugh or the way he ate his food.  Either way you dumped him and now you are regretting it.  Yes my friend, you want him back, and everything you have tried thus far has failed.

Hello? You hurt his feelings and probably humiliated him.  This is most likely the reason that he has not responded to your efforts of getting him back or answered any of your calls. Try leaving him alone for a while.  Give him some space and simply take some time to figure out the real disguised reasons you dumped him.

A well known flawed behavior of females is to test their boyfriends' love by breaking up with them.  He passes only if he puts up a fight for the relationship by trying to get her back.  Is this what prompted your break up?  Did you really want to put this person through this pain and misery?  Think about that for a minute.

It just might be a fact that you may have deep rooted self esteem issues if you used this very manipulative practice of "break up to make up" tactic.  Maybe you should try to work out these issues somehow.  Stop allowing that little voice in your head to tell you that you are not good enough.  You are good enough and you deserve to be happy.  Now that little voice is saying to you, "I dumped my boyfriend and I want him back".  Aren't you sorry?

However, before you can expect to win your boyfriend back you're going to have to work on yourself first.  Being less than confident in yourself and unpredictable is a big turn off for your ex.  Think before you act next time and every time.

In closing, try to sit and talk to your ex.  Tell him what you are afraid of.  Tell him about your insecurities, let him know that you realize your mistake and you acted on a whim and you want him back.