It is no a good way or not but thats what people who are in love do and when they fail they whine just like most of the problems in live they complain and blame it on others.
People who are self aware and self reasoning are rare, if most people are so logical and reasonable we will be living in a much more peaceful world with much less suffering. 
Its a balance of both, if a marriage is based solely on logic "benefits" then it will not be a happy marriage and vice versa. Unless the person you love is rich, smart and knows how to push your happy buttons, and both your families treat each other as good long lost friends, and agree to what ever each other do.