What do they mean when they say
"If you love it, let it go"?
I don't know.

Perchance they mean to say that if you love something, you should want it to take a life of it's own,
and not necessarily that which you would like for it to have.

Perhaps they mean that if you love something, you should let it be exposed to the world,
not locked up in a safe place for you to cherish in comfort and solitude.

What if they meant that if you love something, you should deprive yourself of it?
No.. that isn't the answer... unless, I suppose, you're a nihilist.

Maybe they meant to say "If you love it, honor it by not restricting it".
That's the interpretation I like to take from it:

If you like the warmth the fire provides,
don't smother it in the heat of the moment.
Step back if it becomes too overwhelming,
then return to it again when you make yourself ready again.
This is the most healthy way for you and the fire.

Love is not a possessive quality.
Love is a passive, constant quality.
Love is respect made incarnate.
Love is powerful, yet yielding.

Love is letting go of the personal desires you hold for that which you hold so dear.

Love is letting it be as it naturally is so that it can grow and be fulfilled.

Love is a solution to a problem we're born into: suffering.

Love is limitless, so why impose limits on the things you love?
This is a sign of true affection:
Letting it just be as it naturally occurs.

If it is truly "meant to be", it will happen if only you'd just allow it to.