[notapenny]

You have the option to do all of these things.

I went back to school in the evenings when I was your age after being unfulfilled in my career. Turns out part-time education is full of people ranging from 20-somethings who chose the wrong career when they weren't working, to 50-somethings who just want to do something else.

I'm 40, most of my friends are mid 30s. When festival season comes around in the Netherlands, you can be damn sure people my age are going out there. Heck, we're the generation that started that when we were teens. Sure, I can't stay up until 6 in the morning anymore, but that doesn't stop us from going out until 3 am and hopping from bar to bar. I'll take the weekend recovering over not being able to go out anymore :)

You're not that old. The option isn't the problem, it sounds like your lack of desire is it. My best advice is take some time off, maybe a year since you've got the reserves, read some philosophy, slow down, figure out what matters to you.