Thinking down the road 20 years time. Imagine her, walking hand
in hand with probably her husband. This person you see her walking
hand in hand with might just be someone else, but it might just be
you.
I am not saying that by confessing to her you will definitely be
together with her. But by confessing to her, at least you done
something which you will never regret that you would never had done
in the future.
Rather you regret over something you had already done, then
regretting over something that you haven't done.