give someone a full blown piece of my mind

Well, I did it. Kind of. This chick that liked my brother, then dropped him, and is now trying to pick him back up (as she teeters back and forth between him and her ex), sees me at one of his bands shows. Immediately she rushes me and showers me with hugs and compliments. I’ve met the girl once.
Well after about the 5th trip to the bathroom of her pouring her heart out telling me how great my brother is and how annoying her ex is (also her baby daddy) blah blah blah…I couldn’t take her anymore.
Four words spilled out of my mouth:
“Don’t fuck with him.”
:/ I know …that’s bad
I told her he was a nice guy and he doesn’t need some girl jerking him around at her leisure.
She was stunned.
She walked around with her lip hanging out for a couple of hours before she responded.
“my feelings are hurt”, she says.
I look at her and say nothing.
I told her that I didn’t mean to hurt her feelings but that she can’t expect me to be fake friendly to her because that’s how stupid girls are.
She tattles on me to my brother
He tells her that I am just trying to stick up for him because she screwed him over once already…he said he’d do the same if it were some guy messing with me.
My brother and I had a long phone convo about how girls psycho minds work.
I feel better.
I feel good that I didn’t immediately try to back track and feel bad about what I had said. I wasn’t being mean or facetious…I was being honest and straight for once.
I don’t need to get any more “blown” with it…I could have REALLY made this goal huge, but I’ll refrain :)

I know this sounds really bad…but I usually just hold my tongue and the irritation/frustration/hurt just keeps building…which equals a bad brew