Actually i m 16

hi frnds,
Actually i m 16,studing in xi class,there r so many problems for me without bike,everyday i go tution by bus or with activa(sometimes when it is available),n i hav decided to buy a bike 4 me as soon as possible,but i m not able to suggest whether i should buy xtreme or pulsar or apache or any other.plz give me any suggesion.my email id is nicsmarty@gmail.com