We all have a love since before the foundation of the world. That is God. God loved every last one of us before we were born. That means our parents, and our parents-parents, as so on.
We are to love God with all our heart, soul, mind and strength. Therefore, He is our first love. Love him, because he first loved us.
Ephesians 1:4 (KJV) – according as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love.
Revelation 2:4 (KJV) – nevertheless I have somewhat against thee, because thou hast left my first love.
Mark 12:30 (KJV) – 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: this is the first commandment.
I John 4:19 (KJV) – we love him, because he first loved us.