headlights will not turn off
i have a 95 pontiac bonneville ssei and it has been sitting in the drive way for about a month. I went to start it last week and the battery was dead, so i gave it a boost, then took it out for a rip, then parked it. I came back to the car this morning, and again the battery was dead. so i boosted it again, let it run, then shut it off. But then i noticed the outside lights on the head lights will not shut off. i played around the the switch and the headlights still wont shut off. does any body know what could be wrong?