Relationships end for a variety of reasons. You need to identify every reason if you want to start to rebuild your relationship. Relationships end because of: Fights
Stress
Money
Infidelity
Distance It’s also never just one event that ended the relationship. If you want to rebuild, you need to identify every problem over the entire course of your relationship, from beginning to end. A single fight never ends a good relationship. A single fight ends a relationship when there are other, quieter, more persistent problems.

To rebuild a relationship, you need to start to address each of the problems, starting with what you can change about yourself. In order to create a truly strong relationship again, you need to try your best to identify and address every problem you can reasonably change.
This is a step you cannot skip, even if you get back into your relationship and things appear to be as normal. Imagine your relationship like a house with termites, where termites represented your relationship problems. Over time, the termites ate away at the house until the entire building fell. You are trying to rebuild the house, but the house cannot stand for very long if you rebuild it with the same termite infested wood. You need to start with stronger, better, longer lasting, termite resistant wood. Take the time to try to fix the problems, even as your relationship is healing.

Finally, you cannot rebuild a relationship by simply making a few changes and then forgetting about them. You must also maintain those changes and try to continue to grow as a person. Any time you notice a problem, address it and fix it before it eats away at your relationship. Over time, you will notice that not only is your relationship completely rebuilt, but it is better than it ever was. Before it had problems that caused it to break down. Now it is in a much stronger place, and you are there to continue to help it grow.