BPHope is a hub of excellent, practical advice for flourishing through smart management of your diagnosed bipolar or borderline condition.
Especially helpful for those you love is the section dedicated to caregivers. It includes articles from parents, children, siblings, spouses, and friends of people who have bipolar disorder, including depression, mania, and other phases or symptoms of the disorder. Here is the link to their many very helpful and real-life experiences, shared with people who love and deal with those suffering with bipolar; e.g., how not to let a person with bipolar hijack the emotional tone of a home, and how to support a person with bipolar through a depressive phase.
All good advice is about hope!