esoteric

–adjective

1. understood by or meant for only the select few who have special knowledge or interest; recondite: poetry full of esoteric
allusions.
2. belonging to the select few.
3. private; secret; confidential.
4. (of a philosophical doctrine or the like) intended to be revealed only to the initiates of a group: the esoteric doctrines of
Pythagoras.

Our love is esoteric...Heard by few, but meaningful to those who hear it.