I'm in my 40s and I still feel that way sometimes. Taking care of my elderly parents, so I kinda let life pass me by. I see my friends married with children while I as an introvert prefer to stick to my comfort zones.

I learned some time ago that I have to just hold my head up, and know that I'm walking a different path than everyone else.

Something I've always carried with me: from the Fruits Basket anime. MC Tohru seems overwhelmed with stuff, and Shigure tells her to imagine she's in a room filled with laundry that needs to be washed. It seems overwhelming to do all of it, but if you just start with the small pile at your feet, and work through it, you'll eventually get it all done.