Evolution of L♥VE

I've been thinking a lot this week about what the words "I LOVE YOU" mean to me.   So many songs are written about this word LOVE, just about every "chick flick" has to do with LOVE .... does it  have different meanings to different people?  From the beginning of time there has been LOVE, Adam and Eve were created to LOVE one another, and through all generations of time LOVE has been interpreted in so many ways.
Is LOVE taught, or are we born with that natural instinct? Even though I never heard the words " I love You" growing up, I'm pretty sure my mother loved me.... I mean seriously how could you not, right? ha ha
No really seriously, I think when a mother holds her baby in her arms for the 1st time, at least this is how it was for me--it was instant LOVE--more than LOVE it was I AM IN LOVE WITH YOU, I want to protect and care for you forever and ever.  This type of LOVE grows for a mother and father as they learn to serve that child everyday, changing diapers, bathing, soothing, burping, cleaning up after, restless nights with no sleep--that kind of service and sacrifice can only be understood by a parent who unconditionally loves--  As the child grows they too, learn to say "I LOVE YOU" they learn to trust in you and respect you for the rules that have been set in the home--then something happens when they become teenagers--pushing the buttons, trying to get away with things, some rebel more than others and make it difficult to LOVE unconditionally-- some teens  may stop saying the words "I love you" they may even act as if they don't want to hear it from you, but we never stop saying it those are the years they need to hear it the most, so faithfully we continue to love them, we get on our knees praying morning and night  hoping they will understand why they need to be obedient.  The most rewarding words I have ever heard from my children were "I love you, because you loved me no matter what"