I am a member of nuclear family. It consists of me, my wife Valentina and my three years old daughter Karolina. We are very close and we often spend time together.
Also I have a younger brother, he lives separately, but he likes to play with Karolina, so he often visits us.
Some people say "you can choose your friends, but you can't choose your family", and I don`t agree with them. I think, that one can build his or her family the way he wants. Is not so fast and easy, but it`s not impossible.
Sometimes we have an argument, there is no way to live without arguments. But we quickly come up. There are some advices to quickly come up: to listen, to apologize and to empathize to each other.
And the main advice for family happiness: you must spend time and efforts to construct your family "building". It`s like investing money - now you spend - but in future you will get more.