Why we always watching those show or movie about the process of getting 2 persons together. But not after that? Is because the argument and conflict will show up. End up both of them separate. That is the ugly truth but somehow apply on most of the relationship.
I would like to point out that trust and doubt is the main problem. They doubt and guessing are they the one that their LOVE one is looking for. Once they know the answer is true they fall in love with each other. But somehow after a period of time. They start to doubt each other again whether they still love each other or not. Isn't it funny? Since both of you fall in love because of trust. In the end will have to separate due to doubt.