How can I stop being jealous?

@Jack i haven't even spoke with him yet. But I added him on Facebook - close enough.

I think you should tell this guy you like him. Tell him how you feel about these other girls, because if you tell him, maybe he likes you back and you two can date maybe. You won't have to worry about other girls with him again then.But if you just want to stop the jealousy, I suggest taking a deep breath and say to yourself 'Do I own him?' Hopefully say no, then remember you can't control this guy or girls who want him. Hope this helps.

Just remember that if you hit someone with a chair you are likely to be suspended... Other than that think 'are they making out with him' >>Yes >throw chair at them...>>No > No need to throw chair.