A long video but worth the watch. You may not be going through it right now, and I hope you never do have to deal with it.... but statistically you may and there is a high probability that someone close to you is going through it, will go through it, or has gone through it.
Try to walk a mile in their shoes and listen ... be there for them. Lend and ear. Be compassionate (it's in our DNA). Help them or help yourself. Get some help.