just one day

Recently I saw this movie where two people meet in a train, start talking and have a great time together. But when they had to part, the guy offered the girl to spend a day with him.

His argument: He had a great time with her and thought it could result into something beautiful if they spend more time together. And he was sure that she felt the same too...so she should give it a try. Because if someday she is married and is unhappy with her life, at least she wouldn’t wonder what if she had accepted his offer and that life could have been better and happier today! And just in case she doesn’t have a good time with him, she wouldn’t have anything to regret.

Of course she agreed to spend time with him. And like anybody can predict, she had a great time with him. But what you might not predict is that by a twist of fate, they don’t end up being together.

And for the rest of her life she knew exactly how beautiful life could be if they were together, but couldn’t do anything about it.

And now I am left wondering...what is better?
"To not know how beautiful life can be with somebody and live with that uncertainty, wishing you knew it?" Or "To know it and then not be able to be with that person?"

In short
What’s better???
“To never know happiness?” Or “To know happiness and then not be able to have it?”