Punch her in the face than wake up 3 days later in a gutter, covered in deer blood.
That is usually how most of them go down.
Edit: Ok, Ill be honest.
I will jump in the air, Freeze frame for a second, than fall down and ruin the freezeframe by screaming like a little girl. I will then procede to call all of my friends while said girl looks at me, in disbelief, realizing the mistake she has just made.
The next day, she will not be at school, and we will soon discover she has run away/ committed suicide.