2003 Ford Taurus BATTERY DIE

I just got a new battery in my car a month ago. It has worked fine until now. I get in my car 2 days ago and it would not start but it is still trying to turn over. I KEEP trying and finaly it goes I have to do that every since. Now my problem is that I get my car and it is dead. I get a jump it starts and then I leave and I turn it off it dies. So get another jump I dont turn it off run in side come back out its completely dead no interior lights on. I get another jump and get home turn it off then try to start it right back up and dead again. I'm getting so mad so can you please help me?