Very few people can show their inner person to everyone.

Eating, sleeping, going to the bathroom, doing the work.
Still, why do not you know that you live in a separate human being? If a person could have been a very good actor, he could have been a singer, could be a teacher, could have been very good, could write, etc. etc.
But by doing so you may spend your life doing some work after being unwilling for your own needs.

In my opinion there is nothing to regret. Humans can adapt, so it is happiness to continue living in the diet.

Thinking about what could have happened, instead of spending half life in life, it would have to be life-changing.