I go through this all the time, Lerb (is it Wednesday, yet?). Hang in there.
Times like this, when I don't know what the heck I want to do, I'll focus exclusively on technique. Boring, yes, but it keeps my hands on the instrument without worrying about the fact that I'm playing the same three chords, or I'm playing the same old blues, or I'm stuck in pentatonic purgatory, or whatever. And, dude... I'm 39.
It never goes away. Best to learn to deal with it at an early age.
When you're going through a "what does it all mean?" phase, make the best of of it and focus on scales, technique, or anything that is genre agnostic. Try learning some Jazz standards ("Autumn Leaves" is a good place to start). If necessary, focus on them as clinical exercises. You'll be surprised what it does for your soul, without you even realizing it.
The last thing I'd recommend is to get out and play with others. Even if it's your usual repertoire. The "other humans" element -- and just having fun -- works wonders to get you out of a funk.
Good luck. You're a good player. You need to be out there playing. The world needs it!
