Confessing guilt is not easy particularly if you have always justified yourself before your partner. Often it is this "I am OK, you are not OK" position that lands you in trouble. No one is always right or always wrong. So, do you need Ex-Back-Help?
However, if you fail to see your partner's point-of-view, it may seem that you are always right and they are wrong. If you have done something like that and have had a break-up in the process,
then look back and you will realize that all you needed to save your relationship was a brief apology.
Confessing a past guilt may not always get your ex back, but there is a grand possibility that they will be moved. In many cases, it has been seen that someone's ex has immediately forgotten the split and has agreed to revive the relationship. The same thing may happen in your case as well.
It is possible that your ex has just been waiting for you to say, "I realized that it was my mistake." There is much relief in confessing the guilt than carrying the burden of it. It is just your negative self concept that tempts you to stick to your ego.
If you think that the relationship you shared with your ex is more precious than any false notion you carry about yourself, then confess your guilt right away and who knows you two may be together again.