"
a wrecking ball
I never hit so hard in love
All I wanted was to break your walls
All you ever did was wreck me
I came in like
She rushed in, and smashed (metaphorically) him and their relationship, because he hurt her first, so she's bas getting even. She didn't mean to do so much damage, but she tested her strengths and "wrecked" him. (And he will probably have to pay a lot of money for repairs on hi house!).