Well, romantic love is a subset of deep love, so it will keep all of the attributes of the general class, but add its special aspects, like potential fertility and intense physical intimacy.
Discussion
Every once in a while, I have an epiphany and see, for a moment, why Nostr horrifies normies.
Behold, @Laeserin writing object-oriented pseudocode to define romantic relationships:
I love you guys; keep Nostr weird!