It has often been noted that the English language is bad at describing certain things, and often people will try to dredge up the Greek words philia, eros, agape, et cetera.

Here's the thing, though - the English language is really only bad at describing love if you are bad at English. There are plenty of English synonyms for love (both the noun and the verb) that can communicate all the nuances of your emotions and your relationship. You could say you feel passion, or amorousness, or adoration, or infatuation. You could use words like devotion, or worship, or appreciate, or idolize, or venerate.

And if, unlike Jamie, you have a decent command of cultural references (musically or otherwise), you could draw parallels to Tristan and Iseult, or Cinderella and Prince Charming, or Neo and Trinity. You could quote William Shakespeare or Elizabeth Barrett Browning or Bob Dylan or Justin fucking Bieber. That's what cultural references are for - not just alphabetizing tropes on some wiki or selling a t-shirt of Deadpool in a damn Tardis - cultural references are for refining your own communication.

At least, that's what I use them for.