Dance On My Grave by Aidan Chambers

Summer of 85 by acclaimed French director Francois Ozon is based on this novel.
 
In Dance on My Grave, life in his seaside town is uneventful for Hal Robinson, nothing unusual, exciting or odd ever happens to him - until now that is. Until the summer of his 16th birthday when he reaches a crossroads of choices in life. He foolishly takes a friend's boat for a day's sailing, gets into difficulty and is rescued by Barry Gorman. Their ensuing relationship results in a tumultous summer for Hal as he experiences the intense emotions of his first teenage love.
 
Dance on my Grave was first published in 1982.    This edition includes another  novel,  Breaktime.