Pete7, I read your first post in this thread as a lurker. Your story was very moving. I have been cheering for you ever since and hoping you would start feeling better.
I think I was so affected by it, in part because it is heartrending to read your story and emotions - and also because I figure some day my young son may be in your position.
Regardless of why - I truly hope that you are already or will soon be feeling better. I have no advice to give on depression and T1D. I do know, though, that life moves in cycles, and that we can be very unhappy in some, and very happy later. This probably sounds trite - but think about how many young kids get their hearts broken when they are 17 and cannot figure that it will ever get better. But it does.
Sending good thoughts your way.