Got Bluffed and can't get over it

[Reef]

So I convinced myself to fold the winner in a large pot when I was facing a large river bet. Of course, the villian showed me air. I knew I was ahead but had a moment of weak play where I was convincing myself of monsters that weren't there. Many hours later and I'm still having trouble letting go of that hand even though I had pretty good results for todays session.

Maybe this is just a rant, but any similar stories / advice / suggestions would be cool.

Reef