Defining Love I See

How does one define love?
Love between a boy and a girl,
Love between a man and a woman...

People just able to talk in messages,
Sent on the latest smartphone
Gifted by their loved one...
But whom they cant stand,
Even for a second...

Or perhaps something I see in this couple,
Something that always stays young,
Young in the eyes of the two...
Who as they grow older together,
Get younger at heart...
Are rich with their smiles of love,
And don't mind a worn-out shoe or dirty jeans...
                 
As long as the two are together.
They have the world with them.