If we are looking for the life partner, are we looking for who is identical to us? Say, both of us have same habit, same interests, same thought and the same language. It could help communication when using the same language. No obstacles on understanding each other if we have same thought all the time. Same habit and interests would make us as twins. Hey, is it another me? Is it good for us to love "ourselves"? Are we looking for "another half"?
In the most of the time, there are no two identical persons in a relationship. Does it mean that our life partners would be totally different from us? Two persons are from different worlds. Then it is hard for communication and mutual understanding. It is far more different to have mutual appreciation. What is the force to pull us together?