A true friend

I noticed something
And I'd like to help you through it
Help is what I want to bring
So just chill and sit
You're ruining your life
And i want to help you save it
Don't end it with that knife
I know you can make it
I'm a true friend
And I'll be right by your side
I'm with you until the end
This isn't a problem you can hide
Drugs have changed you
You're different now
Instead of one person, you're two
One's nice, the others very foul
So just let me help you through this
And then you'll be fine
If you die, you will be missed
I'm your friend until the end of time