What movie am i thinking of its driving me crasy?

I remember years ago seeing this movie on tv late night so it may be
hard to figure out but its driving me crazy. this is what i remember,
it was a group of people probably in there 20's hanging out in the
parking lot of a convenience store at night or at least the part i
remember is at night. I remember that there was a lot of drama and
some fights and i remember that one girl overdoses on something at the
end. Im not sure if she does it accidentally or is trying to kill
herself. I think there may have been someone that tried to jump from
the roof of the convenience store. i think it was really low budget
and im pretty sure that there were no big name actors in it. I know i
haven't given you that much info to go on but its all i can remember
but i have had a lot of success with movies i cant remember on yahoo
answers so whatever you can do i appreciate it.