I don't understand

I just don't understand
Why drugs are on demand
A little less pain
for a life of unhandled grief

You will never stop
Because your life revolves around pot
You didn't know I was there
And you didn't care

I will always love you
No matter what you do
But you don't love me
That much I can see

You heard I was sick
Unless your skull is too thick
You just didn't care
Didn't see you come in around here

I was there when you were high
I was there thinking I was going to die
I was there when you came home drunk
I was there watching you fall with a thunk

Seeing you is now very rare
Stop acting like you care
Lost is the man I knew as dad
Maybe I just don't understand....