mood+: sometimes

Sometimes, I felt like waiting, waiting for someone, waiting for some opportunities.
Always there masses that repeating again and again,
 "you lose while you're waiting for someone."

MAYBE,
YET IF I DON'T,
WILL I HAVE ANY REGRET?

In my dictionary, regret was not allowed, before.
I wonder, MAYBE, regret in life just like a twist of pepper, flavor our lives?