Why does it seem that the rain always comes when it is not needed and the sun never comes out when we want it?

Missing Till It Hurts

Is it ok for a person who loves another, and has only been separated from their loved one for two days to miss them till it hurts?  Or is that too clingy?  To much of a needy person to feel that way?  Can love excel to the point where just the feeling of a day without that person feels unnatural?  But is it unnatural when you have a deep personal and loving relationship with them?

May be I am totally out of whack.  Maybe I just need to find others to be with.  But yet there is no one on Earth that is like her in the least.  Without her around for a time like that it feels like I am missing something.  Like something has been missed placed.