If not, you are faced with a problem.
Education is the key.
The person afflicted has to gain an understanding of the illness to realize that there is no reason to be ashamed any more than they would be ashamed if they had hypertension, for example. You have to be aware that approaching the depressed person is not without dangers to your relationship. However, you mean well and you are trying to improve the quality of your loved one's life and, possibly, even to save it. The person you care about may recognize this and may even find comfort or relief in your support. You might also suggest that the person see how many of the symptoms of the checklist match hirs.