Looking for movie That's about a rebellios high school teenager boy who got an assignment that he must do with churchical girl who he later falls in love with but little he knows that she's diagnose with cancer and have very little time left to live -

Could it be this?

A Walk to Remember (2002) - IMDb (http://www.imdb.com/title/tt0281358/?ref_=tt_rec_tti)

Yes, A walk to remember that's the of the movie. Thank you

You're welcome.