Quite a bit like Crazy/Beautiful, but hey? John Stockwell or whoever the hell produced that one copied this.
I just saw it today and missed the first half hour of it, but I know what it's about.
Matt and Casey are high school lovers. When Casey is locked up in a hospital for trying to kill herself, Matt doesn't wanna let her go so he sneaks her out of there and they run away, heading for Mexico. They stop...somewhere (forget where) and Casey gets her little mood-swingy personality back. Matt gets a bit freaked out and finds out from Casey's mom that Casey has bad psychological problems and really needs help.
Casey finds out about this, that Matt called her mom and she plans to kill herself, but Matt catches her on a hill or a cliff or whatever that was, something with sand, and she doesn't shoot herself, rather she gives in and lets him take her back to be hospitalized for her illness.
A very good movie, from what I saw of it.
And Drew Barrymore played with honesty, because from what I've heard she's been in just about the same situation as Casey.