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.