"Convenience"

I'm a convenient lover,

just an ordinary person.

I'm not "special" or "unique," but I'm always there when you need me.

I'm not the girl you bring home to meet your parents.

'm the one who drives you home when you're drunk.

I'm the one who holds you when you need it.

Your shoulder to cry on.

I only exist when you need something.

I'm just convenient, never anything more. 

It hurts to never be more than someone else's convenience.