Well first off, you got to do much more then just go on runs, im assuming you do like 30 min runs?
you have to have track sessions atleast twice a week with some speedy intervals ect. and then days between those workouts go on 30-40 min recovery runs to start. for example
Mon: 30min easy + Sprinting strides (+/-80m)
Tues: 10-15 min warm up run, 2-3 x (600,400,200) (something like that) + cool down
Wed: 30min easy + strides and drills
Thurs: warm up + 8x200s or (something like that)+ cool down
Friday: take off or easy run
sat: some quick stuff
sunday try for a 40 - 50 min run
Something like this would get you in the 2:10s pretty easily. thing with athletics, you have to sacrifice some study time. this is a really general outline. and with your age you might even have to cut out some stuff.