<human>: Provide a brief overview of the text.

I'm going to keep this brief and state the facts.

My girlfriend has a big heart.  She wants to help everyone.   Including her drug-addicted ex; who has come over multiple times and shown his ass.  

I should preface this by mentioning that I've gone out of my way to extend assistance to people in her life up to and including food and shelter.  Most of her friends are genuinely awesome people who seem grateful to have a helping hand in a time of need.

But I can also tell the difference between those who can be helped and those who can't.  And this is subject matter of great contention between us because she thinks she can save him.

I have a child from a previous marriage that I'm trying to protect; and when I say protect I'm not kidding.  He's shown up here after shooting up heroin.  On multiple occasions.  He also routinely shows up drunk.  I doubt he'd hurt the kid.  But I'm not taking that chance. 

I am willing to cut her out of my life to be rid of this dude.  I as much as told her this today.  As a matter of fact I'm pretty much ready to call it quits.
<bot>: GF's drug addicted ex is making a mess of our lives.  I don't want him around.  I'm probably going to end this relationship.  I need validation.