With the passage of time, the flame can become extinguished. However, the magic of love can rekindle it. You will need:

Two sheets of paper
Pen
Black candle
A handful of fresh rose petals
A handful of fresh pine needles

During a new moon (and unaccompanied by your partner), write down on a piece of paper what you want to change, the problems you have, and then fold it three times facing away from you. Burn it with the candle flame.

On the other piece of paper, write down the good things about your relationship and what you would need to feel that spark again.

Scatter the petals and needles, and fold it like the first one, but facing you.

Bury it under a pine tree.