http://theresurgence.com/2013/02/14/the-creepy-mysterious-interesting-history-of-valentines-day
And remember:
1 Corinthians 13:4-8
Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It does not dishonor others, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres.
Love never fails.
Romans 5:8
But God demonstrates his own love for us in this: While we were still sinners, Christ died for us.