One of the harder things I had to do was to "agree" to a 72 hour psych watch for The PR. She threw a dinner tray while there, so she got sent up for 2 weeks. Three suicide attempts/emergency room visits in less than 4 months. She may be 28, but she has the intellect of a 9 year old and the emotions of a 6 year old.
While I was afraid people would take advantage of her, they didn't. She's been in outpatient treatment (originally 3 times a week, now once a week) since then. It turned out to be a good thing for both of us.
Your first responsibility should be to yourself. Don't be afraid to put yourself first.
(Ignore this post if you think I'm being bossy or it's irrelevant to your situation.)
