Human interactions

How we choose our friends. How we choose our work partners? How we choose our spouses. The choice in all is based on the same mechanisms. What mechanisms then are involved in human interactions? Here are the possibilities.
1- You meet somebody. You find that all of what he naturally does makes you happy and he finds that all of what you naturally do makes him happy.
2- You meet someone and you like him so you try to make the things that make him happy though if he was not there you won't do them.
3- You find someone who has a lot of the good things that you like but few others you don't. For the sake of the good things you let it go (stress yourself to accept the differences).
4- You find points of strong differences between both of you. To avoid any confrontation or ending the relation you both decide to make compromises. This means that one time you do what you want and he has to accept or fake that he likes and next time he does what he wants and you have to accept of fake that you like. It is very tricky and very stressful but it is a palliative solution for the big differences.

5- You reach your threshold of refusal and you get the courage to say it “NO" and it would depend on the other party how he would deal with your “NO”, and vice versa.
6- You reach a higher level of aggravation where you do things both of you originally don’t like, just to annoy him as a sort of punishment.
7- You find that there are no points of agreement or common things between both of you and you decide not to get involved in a relation or abort a newly started relation.
Now comes the big question. Among the few hundreds people that one meets in his whole life how can one finds his best match. The one who makes with him the couple in #1. Though everyone tries to pick the best of what he can have yet that sole decision would make your life either heaven or hell.