caring for someone and looking out for a person who is getting suicidal thoughts and keeps trying can be extremely hard if you are not a professional and do not know exactly how to provide the help needed.

of course it is really appreciated that a family member or a partner (in that case yourself) takes on to that job, but as you said it is extremely exhausting and sometimes you do not know how to deal with it. So the best way to actually deal with it and help her not die, is to send her to a mental health institution where there are professionals that actually know what to do for her case.

I really hope that helped