This is definitely me. I've been much more outgoing and social recently, to the point that people I've met have said "I wish I was as social as you, etc" but after a few weeks of this, I reached a point where I NEEDED a break. I coined it "existentially tired." Physically I was alright, but I needed to spend some time away from others. So I spent a day or two almost entirely alone, and it did wonders for my psyche.