This was recently discussed in another thread... I believe it was Mehita who had asked a similar question???
S has been going through some rough times this past year too, while not crohns related, it is medically related and has stopped him from doing what he enjoys. Plus, just the frustration, worries, etc. were getting him down.
My advice to him was to remind him that 'bad' times happen to everyone, sometimes it passes quickly, sometimes not - we can all look back on a 'bad year'... I told him it's part of life and the bad times will end. Of course, how he was feeling just added to his concerns about school, etc., so I pointed out that while the medical issues are still up in the air and will likely take many more months to resolve fully, there are 'end points' in sight... however it ends, school and its pressures is ending soon, he does have a vacation to look forward to, etc.
I avoid simplifying or mitigating his worries, etc. but I do remind him that not ALL is doom and gloom. And, remind him repeatedly that everyone has times where they are down but it will pass (perhaps you can remind your son of some past situation that seemed like it would never improve but eventually did improve??).
When my son was dxed, he was understandably upset and asked why him, etc. At that time, I reminded him of the advantages he had and how he benefited from them (bright = easier to get his grades). I told him EVERYONE has challenges..., and his was crohns. And like everyone else, he had to accept and overcome the challenges. But again, I did not lessen his struggles, they are real but there is no choice but to learn to deal with them.
But, of course, it's not easy and usually not a straight path... for you, as a parent, nor for him, who is actually struggling with the challenges. :ghug: