bad mother I'm afraid...
She's your daughter, she has depression, she needs your help and support and at 18 is barely an adult.
I understand that it is very difficult for you but you should not call her a bitch (especially not on a public forum).
I was like her (undiagnosed hypothyroid) and diagnosed severe depression from 12. My parents blamed me and threw me out at 16. They are both doctors and should have known better but did not (perhaps did not want to) believe my diagnosis as they felt it would mean they had failed. They still don't fully accept that I was ill.
I was the eldest and my behaviour impacted my 3 younger siblings greatly. I believe kicking me out was the only choice they could have made at the time given that they were completely unwilling to accept I was ill and had to think about the other children.
Doing this caused me great harm however. I will probably be affected by it for the rest of my life as I was unable to continue my education and although we have rebuilt our relationship over the last couple of years, I will never forgive my mum for a lot of things, which causes her and I great sadness.
You need to think very carefully about what choosing this view will mean. She will always be your daughter, you'll always have to have something to do with her and some responsibilty for her. Washing your hands of her and her problems is not an option. Making her change is not an option either.
Have you been in family therapy? What treatment is she having?
Speaking personally, I am very lucky that I am fine now. I could very easily have ended up dead or with HIV or other terrible things. If you wash your hands of her and this happens will you still ignore her and not feel anything?
When my parents kicked me out I was drinking and self-harming. The self-harm is one reason they gave for making me leave. I lived with my boyfriend for a while then went back home and was kicked out again.
Being kicked out made me worse. It confirmed all my feelings of being a terrible unwanted dark thing.
When I came back I added to the drinking and self-harming with stealing from them, taking drugs and having casual sex. This is why they kicked me out again. I would and did take medication but it took a long time to get the right medication and even then it only takes the edge of. I believe I needed therapy, which I never got.
When they kicked me out the second time everything got worse, I didn't need to steal to fund my self-destruction as I got a £6000 inheritance and drank, swallowed and stuck it all up my nose. I almost succeeded in killing myself as my suicide attempts got more and more serious.
I ended up in a serious of relationships with abusive men with drug or drink addictions.
Things began to change for me when I got pregnant at 18. My abusive boyfriend forced me into an abortion - the ward nurse watched him threatening me into signing the papers with a shaking hand, through tears and did nothing.
The same abusive boyfriend is the father of my first two children. I was diagnosed with hypothyroid after my ds was born and since then the depression has been better and/or manageable. I am now married, happily and successful in my life.
My life is good now, my parents know very little of the missing years and my family and I are all very close. There are things though that I will never forgive them for. We are all lucky, I could easily be dead, in prison or dying of a horrible illness related to alcohol addiction or sexual promiscuity. Replace me with your daughter when you are thinking about asking her to leave.
I don't agree with the people who say she needs to learn to take responsibility. If you have depression this is not possible until you get a grip on your illness.