Love, romance and passion in a relationship is also magic and work, especially in long relationships that they need to be maintained.
But to keep that magic it is necessary for the partners mutually to maintain and to invest in it.
For satisfaction in the relationship, it is important the readiness to invest energy. Under investment in the love I do not think that any of the partners, at any time, must be attractive, but that they are ready to see her/him in different light, be next to and to take action when it is needed . Bought partners have to have interest for each other and want to be together, even when they are silent to feel comfortable.
Love should not be hard, but it is not easy. However it is worth to love anyway ...