an eye for an eye

i am filled with a great sadness tonight. someone i love is hurting. and after so much time, i no longer have any answers. i am at a loss. how do you help someone who doesn't want to be helped? when this person has severed all ties with the outside. they have hurt me. they have hurt others. how much longer will i be forced to sit in silence? will it get to the point when i would rather watch them go through this suffering, instead of stepping in, and trying to share the burden. at what point do i become the cause? when i am no longer standing next to them, but instead standing on this bundle that they carry on their shoulders? what of the one who is the cause of their pain? are they not worth helping as well? is it truly natural to slander the one who causes pain? to forget their humanity? is there anyone who isn't worth saving? is it ever okay to say, "you are not worthy"?