Sad, Romantic, Teen dramas like "keith"?

PLEASE no "A walk to remember". I'm looking for a PG-13 (NO R-rated.) movie with teen stars, a deep storyline (So no Cheetah girl stuff) and maybe a sad/unpredictable ending or twists. I already checked out Greta (Saw it) and Teenage Dirtbag (Didn't like it). So any ideas?