Life is short and we shouLd live in the best way as possible, with full of happiness and peace. It means it's only possible when you will never feel regret for your decision as whenever a person feel regret it's become that stage where he or she dissapointed for failed to do something, which is sometime goes to the stage of depression which Iss very bad for physically as well mentally.
In our daily life we use to do take decisions, which help us to move forward but it's not possible to take all decision right for all impact , we people only regret for our wrong decision which we can't change, but why not we take that as experience or lesson for life and move forward for new things..
Don't think so, nd never ever regret in life, try to forgive yourself and move forward:)
ThanK you!!