My mom is obsessed with Facebook and it is tearing us apart please help?

[Midnight L]

Just tell her how to do it herself, and tell her you have homework to do, need to clean your room, or have something else that you need to do. Try getting a job or an activity in which you should be out of the house (church groups <even if not religious>, band, animal shelter volunteer, etc whatever you find interesting, would all be good ideas) and she can't be mad at you for it.