Confusing Dreams

After my dad passed away, I started to have these dreams. 

Like I would be out and about somewhere and I'd see this guy who looked exactly like dad.  I would follow him.  He would lead me on a long hide and seek kinda chase.  He would attempt to shake me off.  I would even lose him a few times.  But I'd keep picking up his trail and continue following him.  Eventually, I would reach him and he would turn around and go:

"Ha ha… you got me!  Wasn't that fun?"  

And I would go "No… actually.  It wasn't."

I would be so angry at this completely tasteless wild-goose chase.  I would be so angry that frequently, I would wake up with intense rage.  I would physically be shaking.  My forehead would have this scowl carved on it and no matter how much I rubbed at it, it refused to un-scowl. 

My fists would be clenched tight.  When I forced them open, I could see the half moon depressions of my nails on the palm of my hands.  I had to physically get up and get a drink of water.  I had to take several deep breaths with constant reminders that it was just a dream before I could calm myself down. 

The weirdest part of the dream was that at no point was I convinced that this guy that I was following around was my dad.  In fact, the whole reason why I was following him around was to prove to myself that he was NOT dad!  I knew that!!  Even in my dream!!!

When I caught up with him at the end, there was actually a fear – what if he was dad. What would that mean?  That is the weird part.  And then I get angry because I was right all along, and this guy is not dad.  That is the weirder part.

Then the frequency of the dreams went down.  But the intensity remained the same.  Throughout the years, I've seen various different scenarios.  This guy who is my dad look-alike appears in different places, and each time leads me on a wild goose chase because I simply have to know for sure; and each time I end up angry as hell. 

Just don't understand it.