They may need different types of support from different people. No one person can do everything for them. It can help you too to know that they can go to other people for support if they choose to. Sometimes, a counselor or trusted friends and colleagues can help in ways those closest to them can’t.
You won’t be able to magically make everything better straight away, but by showing them that you believe them, that you don’t blame them, and that you want to help them regain control of their life, by listening, respecting their feelings and views and showing you care, you can make a great difference and help them begin to heal again.