it sounds as though he treated a girl he liked. or loved. like crap.
and he knew it.
now he feels bad for everything he did to her.
[I wish for nothing but the rain to fall and wash away everything that I've done wrong find a way to make you strong.]
but is glad that she was able to finally leave him
[You needed just enough anger to get you through the door.]
because it was for the better.
it sounds as though he treated a girl he liked. or loved. like crap. and he knew it. now he feels bad for everything he did to her. [I wish for nothing but the rain to fall and wash away everything that I've done wrong find a way to make you strong.] but is glad that she was able to finally leave him [You needed just enough anger to get you through the door.] because it was for the better.