movie about paralyzed boy

Are you sure the movie involves a boy and not a girl? The plot you have described matches Joni (1979), except it was a girl in that film. https://en.wikipedia.org/wiki/Joni_(film)

There is a 1979 movie called Joni, in which a girl becomes paralyzed after a swimming incident, but that is probably not it. A boy does become paralyzed in A Walk to Remember after a diving mishap, but that movie came out in 2002, it stars Mandy Moore. Either of these seem familiar?

What about The Dive from Clausen's Pier (2005)?

I’ve been looking for this movie for years!! Immediately after the accident, in the hospital, the mom is very distraught and tells the dr, “maybe it will heal.” Let me know if you get a positive answer!!