Earlier quoted context omitted.
Whenever I find myself having similar thoughts I reread Willa Cather's story, "Paul's Case", here's the relevant part, the very end: "He stood watching the approaching locomotive, his teeth chattering, his lips drawn away from them in a frightened smile; once or twice he glanced nervously sidewise, as though he were being watched. When the right moment came, he jumped. As he fell, the folly of his haste occurred to h…
Okay, so the last few years I've had time and means to travel, and I'd like to comment somewhat on a perspective I gained while doing so. The list you gave- I've done all of those things. Well, change Machu Picchu to Pompeii and Somalia to the Congo. I realize your list was not comprehensive- but let me realize the spirit of your post and say I've done a large subset of the "things I'd like to do before I die," save…
I've come to realise this quite strongly myself over the years as various things succeeded/failed, that what I thought would help it didn't, and that all that helps is to face the depression and actively find ways to fight it. I've found schema-based therapy very effective, for example.
I really hope you find a way to resolve these issues, or at least ways of making it better.
If you want to talk (hope this doesn't sound awfully patronising) you can find my email address in my profile.