I know what to do

I let you break my heart...tear me all apart but now I know what's best and you don't pass my test.
You walked all over me...and I refused to see but now I Know what's right...so get out of my life.
So you say it isn't so...pretend that you didn't know....well i just don't believe you because now I know what's true
I let you burn my soul...never knew you were so cold...but now I'm over you...I know what to do