Title of a Song please

[ImmoraL]

Can anyone tell me which song these lyrics come from:

"Now you've left me
And went God knows where
I realise now I really care
And now I know why we didn't get along
It was me who was doing wrong
I really care"

It's either a solo female artsist or a female singer in a band. I have a tiny music clip but that's just about all of it LoL so any ideas would be welcome