BosGuy brain teaser

Each Friday morning I post a riddle to get you to think outside the box and exercise your brain.  If you are stumped, share it with a friend or colleague and see if you can figure out the answer together.

I’ll confirm answers in the afternoon so don’t worry if you don’t see your comment posted right away. I want to give everyone a chance to guess.

This week’s riddle
I may seem real yet I am not,
Once you’re gone I’m oft forgot.
Time here stretches and it shrinks,
It all depends on how you think.
What am I?

Like riddles? Check out past week’s brain teasers.