I don't wanna do this anymore
I don't wanna be the reason why
Everytime I walk out the door
I see him die a little more inside
I don't wanna hurt him/her anymore
I don't wanna take away his life
I don't wanna be...

A lie I didn't have to tell
Because we both know
Where I'm about to go

*Unfaithful - (adjectives)
1.not faithful; false to duty, obligation, or promises; faithless; disloyal.
2.not sexually faithful to a spouse or lover.
3.not accurate or complete; inexact: an unfaithful translation.

4.not adhering to promises, obligations, or allegiances; disloyal