Guys teasing me and what martial arts can I do?

Erm.. .Well best thing to do is get a book or something and ignore them while acting like your reading. If they start hitting you or something then punch them in the face or something that way once you show them your not taking their crap anymore they will back off. Screaming wont do anything but make them do it more for the reaction. Also martial arts is useless as far as I am concerned. Your best bet is to learn street fighting through experiance. It is the best fighting technique in the world cause there are no “Combos” or “Proper stances” etc. A street fighting style is your very own personal style which is why its always so effective. Sure you will get hurt a few times but after awile and about 5-6 fights you should be getting the hang of it. Also hair pulling is useless it just hurts doesnt harm and causes unneccesary noise to attract attention so try to leave that out. Hope I helped.