We love someone so hard and stick with them for a long time.
One day when we realize another person's presence, we prefer hiding all our love and slowly walk away.

We love watching OUR girl/guy happy, no wonder what we have to go through. And still that person thinks that we found someone new and are busy with our own lives, but the truth is, "We still live and love for the same person as we always did."
We can't always smile with this situation, but we still do because "they" are happy.