if WAS comes back THEN I will be happy...not necessarily, that's only where the really hard work starts
Oh we see that time and again, don't we? How can it be easy, you're talking about restoring an unhealthy relationship back to good health, but the relationship is only as healthy as the people living in it! Just getting back together does not problems solve.
So, it's a fallacy to think that because the WAS leaving is what had made you 'sad", that the WAS returning is what will therefore make you "happy". Nuh, uh. What's really happened when the WAS returns, is that the person that made you "sad" is now living in your house again!