I mean, hey, I have no idea what the future holds. 10 years feels like such a long time from now, I'm still pretty young. Even if my short-sighted plan only keeps me happy for a few years, well hey, that's a few years I get to enjoy. I'll take what I can get, and I'll figure the rest out when I get there. I'm feeling hopeful, and I want to do something with that hope for however long I have it.
Even if you've lost hope, there could be good things in store for you, oldie. I work with a guy who just turned 50 this year. Single as ever, but he doesn't mind. He goes on roadtrips around the country, hikes in the mountains visits museums, spends extraordinary amounts of money on fireworks, goes to rock and roll concerts, and is just living it up like he's still 20. He may be a "failure" because he dropped out of college, works a low-income job, has no kids, and lives with family, but dammit he's enjoying his life. I hope that you can learn to do the same, even if your plans don't work out.