I am fast for a girl and can overtake boys when running but there are only a few that are faster so [B][I][U]PLEASE help me

I don't mean to be sexist, but, generally, men are physically superior than women, hence they have the potential to achieve levels of speed, strength, power, endurance, etc. that women can never achieve.

This why men and women don't compete against each other at the Olympics or other sports events.

That being said you can definitely get faster than a lot of people (even boys). Follow a training program designed according to your goals.