You don't stop; you turn that love into a star, one that shines in your night sky. It becomes something you can gaze at from afar and admire its glow, even if that glow no longer lights up your path.
You don't stop loving because, to that love, a part of you belongs—a unique version of you. That love was for who you once were and certainly for who you are today.
You don't stop loving because that love becomes immortalized in time. Even though your days carry on, distancing you from that moment, sooner or later they will lead to new moments where other stars await and where, perhaps one day, you will find one with which you can shine in a sky meant just for the two of you.