Possibly an unpopular answer, but have you tried exploring or investigating any religions? I'm in my mid-30s and I've found religion has given me a profound sen

Possibly an unpopular answer, but have you tried exploring or investigating any religions? I'm in my mid-30s and I've found religion has given me a profound sense of purpose and identity and community compared to a lot of my peers who have similar struggles as you (rich, but increasingly unhappy and nihilistic). Of course, there's always the question of "which religion" since obviously all religions in aggregate have contradictory teachings when compared to each other. And if you absolutely can't bring yourself to believe in something like God without hard empirical evidence, maybe religion isn't for you. But in my opinion almost any religion is better than none if only for the uplifting camaraderie alone, so if you have even the tiniest desire to believe in something greater you could just pick one you think looks good and try it out for a bit and see if it has any positive outcomes in your life. And if your initial choice turned out to be good but sub-optimal (which it most likely will if you picked at random), as your faith grows you can trust that you'll be guided to switch to the best one for you over time (if you so desire).