Someone drugs a guy who goes swimming, he gets sick Girlfriend watch and tries to help but falls and hit her head and falls in the water and drowns. She comes back as ghost and has a angelteacher to learn her things. She tries to warn her friends for the evil girl
Dying to Live (1999)
http://www.imdb.com/title/tt0194835/?ref_=kw_li_tt
Yes!! Thank you! I couldn’t remember the title. Case solved!
Thanks ChickHabit!