I Crack the Cartilage in my Nose As a Habit and Have Since Puberty Could This Have Made my Nose Pointier As the Years Passed?

It shouldn't have any effect on the structure of your nose.  If you feel your nose is too pointy contact a local plastic surgeon in your area that specializes in the rhinoplasty procedure.

The cracking of your nose is most likely the movement of cartilage and a noise associated with the movement. This habit should not affect the cosmetics of the nose. It would not make your nose more pointy.Hope this helps.