There's a song lyric in a French song that goes like this:
Je t'attends depuis longtemps, toi l'amour
Which means, more or less:
I've been waiting for you for a long time, love
But there love is not an affective nickname to a significant someone, it's addressing love directly, as a personified concept. Kind of like "Death is coming to get you".
The sentence means "I've been waiting for love for a long time and it's finally here". But it doesn't work if I use "you".
I can't find a way to express this in English with no ambiguity, I'd need a complementary sentence explaining it.
I'm not sure a capital L would do the trick, and the ideal solution would work when spoken.