Hospitals in Canada aren't meant for therapy. They are meant for safety and stabalization. It is outpatient that they work on the real issues, talk to you and help you heal. The system is not set up to be able to provide support like that while people stay there.
Another issue is that if you do have BPD anywhere on your medical file, they will most likely not want you to stay in the hospital for long, unless you are a danger to yourself or others, which I hope you are not. The opinion I came up agasinst again and again is that people with BPD do not succeed by hospital stays, it ends up making them more dependent on the healthcare system, not less. I'm not saying this is true, just what the general attitude toward this diagnosis is.
If you really want to find a place where you can heal and get bettter, I suggest seeing your dr or therapist to see if such a place exists.

It sounds like you could use some help building emotional skills to help deal with the black/white thinking, the extreme emotions and the ability to self soothe. It may be helpful to look into DBT (Dialectical Behavioural Therapy) which helps teach you how to navigate those emoational highs and low and learn to see the gray. Most therapists/programs for DBT are very supportive, and this has been shown highly effective for helping people diagnosed with bpd to get their lives back.

Good luck with things!
IJ