I have never been a believe in the "SPARK" being important in a relationship. Especially in a long term relationship. Think about it gud. What is a spark. It is a shinning bright light that only appears for a quick moment and disappears. That is not what love is. That is not a essence of a long term relationship, and much more, dili na angay pangitaon if you plan to think about marrying someone. Because if you rely on this "SPARK" that you love so much and let it define your relationship, you will never have a long lasting one. You will constantly try to rekindle this "SPARK" and eventually you will run out of options.
(I have never been a fan of "SPARK", Fireworks or magic in a relationship. Like all things else, it only lasts for a while and then is gone. Love is something more than that. It is constant and it is a commitment. Not a "SPARK")