It is perfectly acceptable to select friends for（ 因为）special qualities as long as thereis a balanced giving and taking that is mutually satisfying.
翻译：只要能够平衡给予和接受,并且互相满足,就算因为一些特质选择朋友,这也完全可以接受.
as long as 只要
giving and taking 给予和接受
mutually satisfying互相满足的.