Illusion to Reality #7 :- Why do we make relationship?

Let's start with the very basic understanding of realationship.

Realation of any kind wether its between a mother and it's child, a boy and a girl, son to its father, teacher to students, friends to friends. All these are a connection "an emotional connection" among two. So when I am saying emotional, it simply means we can't see this. It's not exist in quantity. It's a felling that an emotional being can feel.

Why do make connections (relationship).

If I take it in more general way "we are social being" and thus we need more then food, i.e love and affection. For search of love and affection, we cake connection. We make connections not for other, but for ourself. We need something from other. There a relationship a boss and employe, is not becouse boss loves there employs, it's become they need someone to work for him. And also at same time employee need money so they make him, his boss.
Even in relation of husband and wife. Both need something from other and if they are able to fullfill needs of one another. They get involved in relationship.

So it's a simple concept, we make realation to fullfill some of our need, if you expect something from other then, they also have some explanation from you.

What spoil the relationship?

"Expectation from others" spoil relationship. Yes this is right, we expect something from other in any relationship.

A relationship between a father and son, child expect love and care from his father. If his expectations fullfill my father then, he is good father else, bad. We in realation with girlfriend or boyfriend, expect much from other and if he or she fullfill it. We say " hay I have best partner and we love eachother". People said we have a good understanding in our relationship.

I said "what understanding", understanding comes only if do expect something from other. Why don't we do unconditional love "love without expectations". If one's it happens, there is no need of understanding.

Does loving someone without expectations is so hard? I left this question up to you. Please share your views.