Here is a useful article titled “The 10 Secrets of Happy Couples” (psychcentral) which accentuates the importance of being “realistic.”
Excerpt of the article:
They might be 30, or 75. They come in all colors, shapes, sizes and income brackets. It doesn’t matter how long they’ve been together. Whatever the demographics, when you see a happy couple, you just know it!
How do these couples stay in love, in good times and in bad? Fortunately, the answer isn’t through luck or chance. As a result of hard work and commitment, they figure out the importance of the following relationship “musts.” Because few couples know about all of the musts, I think of them as the relationship “secrets.”