What to do to make up for a mistake?

Love is the strongest emotion in the world. Search your heart and show your Bookie you love him by humbling yourself to him and admiting your fault and understanding that he might after 5 months or however long it's been just still Love you. There's power in humbling yourself and admitting wrong with the acceptance of the consequences. People, depending on the heart, will think things through a while and see your actions as honorable and show you his heart and love by accepting you back into his life. But, please be sure that's truly what you want or your only setting yourself up for future problems.

Totally depends on the mistakes and the type of guy he is. If you can figure out a way to show/prove that you won't make those mistakes again, that's the best way to get him back and keep him.