Aries:
"Oh hell no!" *punches the guy*
Libra:
*looks at guy with his "don't even try it" look*
Taurus:
"Don't even try talking to her."
Scorpio:
" I'm sorry but she's actually MY girlfriend, so would you do me a favor and go away immediately.Thanks."
Gemini:
*calls bodyguard to take guy away."
Sagittarius:
"You better run"
Cancer:
*Stands between the guy and you and claspes his arms*
Capricorn:
*Shows with his arms how much distance he should hold to you*
Leo:
"Don't even look at her."
Aquarius:
"Do you know who I am? I can make sure that you never find a job again!"
Virgo:
"Who do you think you are?"
Pisces:
*traditionally fights him*