In the phase of romantic love, the lovers feel very passionate about each other. They want to be together. They want to make each other happy. Their only objective is to enjoy the romance, send love notes to each other and enjoy the bliss of romance. After sometime, this phase passes away because of ego, relationship misunderstandings, expectations and other life problems that become more prominent. Can we not stretch the romantic love forever? Experience says that it is not possible, but some exceptions are there. why not follow the exceptions? Let us see how.
Talk about this with your beloved in the beginning of the romantic phase. Tell them about how romantic love dies soon. Make a pact that says that let anything happen, we will not let any misunderstanding, any expectation or any other problem end the romantic love. Read the pact everyday and live by that. As soon as anything happens, remember the pact and go back to romantic love. I think that there is no other way of keeping romantic love alive forever. If you can manage that, your life will bean envy for everyone.