hrm 134, I am sorry that like the rest of us you find yourself here. The most helpfull peace of advice I have been given here is, do not not focus on him/her, because if you do, you will get
drawn down yourself. Its not easy because of how unjust it seems and, it is, but you cannot fix it, it needs to run its course.

Try to detach, read Cadets reading material, its hard work, some days are better than others, look upon him as a room mate !

The bomb drop for me was last April, w moved out 7 months ago, no significant change to date. Some days I want to shout and scream at w, others I am more in control, getting on with my life.

Not sure this helps, but your not alone.

Be strong, be poisitive !