"For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life." John 3:16

Because of God's love for us, He sent His Son, Jesus Christ, to atone for our sins. Heavenly Father perfectly knows what will happen to Jesus Christ.
Because of it, Jesus Christ as an obedient Son to His Father truly understand the meaning of love.
Also as a master teacher, Jesus Christ taught this principle unto his people:

"And thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength..." Mark 12:30

This is the first and great commandment Jesus gave to us.
How does Jesus Christ knows perfectly about love?
It is because he is truly the Son of God and he acquired that attribute from His Father in Heaven and he understands what his Father's felt.
We all have that kind of attribute if only we discover, develop, and try to be like Christ.
Jesus Christ loves us as well as our Heavenly Father. He wants us to be like him. To act, to talk, and to walk like him. He is  a man of righteousness. He demonstrated during his ministry how we must spend all our days loving our neighbors. He stated, "A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another." John 13:34

Heart's day is on the air. It is the time also to perform what we have learned from our Savior. Not only we will spend time together with our loveones or sweethearts, but also to grab the opportunity to let other people see a Christ in you. Share a heart of a Savior.