I'm not going to tell you that it's not going to be easy, or that there are ways of finding out what to do and how to act. I'm not going to tell you exactly how to treat these conditions and disorders. The fact is, everyone is different. That includes every person who has these problems, and every person approaching them. A colleague of mine once told me that when discussing their anxiety disorder, they only responded well to "tough love" from some people, and not others. They needed wisdom and support from me. They needed a "get over it" talking-to from someone else. They needed endless cuddles from yet another. Not everyone needs the same thing, and practically no one is able to give every approach.
What I an going to tell you to do is this: don't stop caring for them. Don't write them off from your thoughts and your prayers. I've (sadly) seen too many of these cases where it would be easy for one party to cut the chord and walk away, since these disorders are inherently isolating. And while it may not be possible to constantly be by their side and hold their hand, as much as we might like to, we should never stop trying, even indirectly, to help. Even if "helping" is just changing the subject, or giving them a hug, or asking their family how they are.
Never stop caring. When these situations arise, we often find ourselves in the most difficult positions in which we've ever been; but we must always remember that these, like us, are children of God. No matter how they treat God, how they treat themselves, or how they treat us - we owe them love. And as we talked about at the meeting, that means different things to and from different people. But it's still owed. And now, more than ever, when these problems are so prevalent, and the idea of love is so warped and unrecognizable, we need pure and genuine love for one of the darkest problems we have ever faced.
Band together, and be the light in the darkness when no one else will.
"For I am the LORD, your God,
who grasp your right hand;
It is I who say to you, Do not fear,
I will help you."
CYM, St. John the Evangelist