A Reason, A Season, or A Lifetime

They say that people come into your life for a reason, a season, or a lifetime. I'm finding out more and more that this statement is true. My problem with this is you never know which is why a person is in your life. You can find yourself tryin to spend a lifetime with somebody that is only meant to be there for a reason or a season. On the other hand a person that was supposed to spend a lifetime with you, you cast off as bein only there for a reason or season. This all makes it hard to figure out who you are supposed to fight for and who you are supposed to let go. I guess the whole point in not knowning is to make sure that you treat every person equally. However, a bad reason or season will prevent you from finding what you've been looking for for a lifetime........