What's the best way to deal with something like this as a friend of someone with something remarkably similar? I have a close friend who's always going to see specialists with some ailment or another. One of the things he has is low magnesium and zinc just like this author. He's also suffered from bouts of unexplained amnesia (is that where the author got the name for his blog from? If so maybe they actually have the…
How another person lives his life is fundamentally his decision, and it is not your responsibility to fix him. Your frustration with him is your problem, not his. At first blush, I would recommend either accept him or walk away, for your benefit and his.
My suggestion would be to start to talk to your friend about how you feel about his/her situation. Try and get an understanding of just how they are feeling.
Dont just come into a conversation with all your advice ready to go because it will make your friend back off.
Be prepared to spend sometime to get to understand the underlying causes behind his/her need to shut down and not live life.
There are probably some deep seated fears and stresses which are causing him/her to be this way.
Walking away and just turning a blind eye to them is not going to help anyone.