What is a sad song about loving someone other then the one your with?

Haley: What is a sad song about loving someone other then the one your with?
I need a song about loving someone other then the person your with. </3

thanks I'm open to fast and slow songs alike I would just like a song that describes my feelings right now.

Answers and Views:

Answer by George
she will be loved – maroon 5

Answer by Jaslene
Nelly Feat Kelly Rowland – Dilemma

Answer by burklundjb
In Loving Memory-Alter Bridge