Is it so difficult to be the perfect couple? 

The definition of a perfect match is completely subjective, because the ideal partner will usually depend on pur personal tastes and even our own culture; but we can bring to ligth certain characteristics that encompass the global definition os the perfect couple.  

Source: http://www.aumentandomiautoestima.com/blog/tag/the-perfect-couple/

1) Feel good next to each other

Yes, that simple. Feeling so good that it is a necessity. Any excuse is enough. There is nothing to do, just be together. It is to feel comfortable, relaxed, confident, without protocols, without costumes. Naked body and soul. Being lovers of virtues and defects is priceless.

2) Project life together

The ideal couple live the mutual need to project a whole life together. They know how to make their small things really big and the big ones make them small to be able to cover them without at any time losing their protagonism to their relationship. Everything makes sense if it is done together. Buy gifts, travel, change your home, start a new job, release a new coffee machine, have children, know how to fit the difficulties and bad times and enjoy the good ones. Projecting a life together is the result of feeling good next to each other.

3) Confidence, correspondence and freedom

It is to feel that there are no barriers or distrust. It is feeling corresponded at all times. It is feeling that you are free, but that you would not mind being a slave to yourself. 

4) It is feeling that everything is possible

Yes. Even magic, the sky, the stars, a miracle ... Everything is possible.

Source: https://www.youtube.com/watch?v=qIJUKW8OmKk&t=176s

Reference: 
- https://www.euroresidentes.com/love/couple/the-perfect-couple.htm