When I Find Love Again

Quite a simple premise.

He knows that he wasn't the man he should have been when he was with her in the past and that the mistakes cost him what he had.

And he wants her back and to do so, he knows he has to be a better person, a better man and be better in relationships.

Additionally and interestingly, parts of the song suggest that he knows he has to be a better person within relationships and love with anyone and not necessarily his previous flame.

He knows he messed up and will use another relationship to prove that he can be all he should have been for the one he loved. But in doing so it is only proving to himself that it is possible not to the one he should be showing although she probably told him to move on so he thought this was the only way to make things right. In the end, He is not being fair to the one who is helping him become a better person, the person he longs to be, the person he wishes he was to the one he lost. He feels he can prove this to the one and win her back but someone will be hurt in the end. He can't play with the emotions of one while wanting another it is not fair to either of them. Unfortunately, he can't prove to the one because he messed up and she cut him off. Maybe he moved on ad then realized he would just be that man for the next one because he has no other choice now that the one is gone.