Maybe 3, 5?
Look at all the opportunities you have in your day to tell someone that you love them.
There are no "real" second chances. You can't re-wind time. There is no Dr. Who to help you travel between time and dimensions.
Jules Verne is not going to build you a time machine.
Think of all the people who cross your path every day. How many of them would benefit from hearing you say those three simple words? What kind of benefit would you get?
The best kind of benefit ever. The knowledge that you were able to tell someone you love them and mean it with all your heart.
You love your spouse.
You love your children.
You love your parents.
You love your siblings.
You love all members of your extended family.
You love your friends.
You love your neighbor.
You love your Christ family.
Show how much you love by taking a few seconds every day and telling those around you. You not only will make them happy, but you will be happy as well.
To Love is to be Loved.
"And the Lord make you to increase and abound in love one toward another, and toward all men, even as we do toward you:"
-- 1 Thessalonians 3:12