He's probably holding her right now.
She's probably wishing the moment could never end.
He's probably kissing her tenderly on the cheek.
In their little soft, serene relationship. Everything is perfect.

And, He will secretly wish he never met the girl that came before.
She almost ruined him.

But, the girl that came before will always wish she did things differently. She would have still had him.
It was just a lesson she had to learn.
She will think about him now, and the girl that he holds in his arms, wondering why she is so special.  
She will think that the girl that he holds deserves him more than she ever did. And it will be true.
It was just a lesson she had to learn.