Yes, I believe in love at first site. I dont think there is a standard definition for love--because there are too many different kinds of love.
My picks for love songs,
She believes in me--Kenny Rogers
Through the years--also Kenny Rogers
Layla--Eric Clapton
Lean on Me-Bill Withers
Tears in Heaven-Eric Clapton
Lady--Lionel Ritchie
As you can tell from my list--I am not real sure what makes a good love song--it just strikes a cord and either works or doesn't. Love lifted Me could be added to the list with anyone who sings the song.
My favorite romantic poem--thats a toughy--Probably--How do I Love Thee--Elizabeth Barrett Browning--then some of Shakespeare's Sonnets--and some of the Psalms are very romantic.
Romantic movies are hard also--Casablanca, An Affair to Remember, The Quiet Man would probably top my list.
