Have you ever noticed what is un-conditional love?
its type of love that dont require always a positive response from the other person. its without conditions. mostly our parents , brothers sisters , wives have this type of relationship. and keep in mind , if you feel that you dont have this relationship with them , then please change your mind and realize that you can not have alternate of these relationships.
But at the same time , we must accept that every relationship is not un-conditional. even best friends don't have this strong bond. you may disagree with me , but start thinking practically , that how you make friends , they have common interests with you , they give you favor and time , you give them the same. so rethink , that is that really an unconditional relationship?
For all the "Conditional relations" you must have a rule,
whether its your business partner ,
whether its your best friend
you must have a rule
what ever deal you have with them , you must see your benefit in it.
No , its not selfishness
but its the secret of the long term relationship.
i will explain this with examples.