<human>: Can you give me the gist of the text in a nutshell?

I met a guy a few weeks ago.  We've gone out on several casual your typical run of the mill coffee/sausage & beer dates but nothing serious.  I like him.  Even after the first encounter during the 'are you a serial killer' vetting process, I felt like I knew him for years.  And that I knew him a little too well.  He's funny and always has the right deadpan one liner response for everything.  At first I thought, 'damn, we have the exact same sense of humor.  yes, yes and YES!.'  Upon further thought and with suspicion growing, he jokes seemed a bit too familiar.  
  
Don't get me wrong, quite often I get my source of inspiration from Reddit.  I've taken more than my fair share of jokes from here, but like an honest person, I usually say where i heard it from giving credit where creative credit is due.  
  
  Back to the story.  So I began to see this familiar reddit-like theme with his joke telling.  That's okay.  I brushed it off.  Fast forward to two weeks ago.  We were in the middle of our usual story telling session, when it was his turn, he came out with this  [gem] swapping out the gay boyfriend for his ex-girlfriend.  
  It took me forever to find the story on Reddit, but when I did, there was no denying it.  I was dating a paraphraser.  Since then, I've caught him saying at least three other stories that I remember reading.  Finding them was impossible, but these stories I could clearly recall as having seen them before.
<bot>: I am dating a guy who is crediting stories on reddit as his own.  What do I need to do to keep dating this man but make him stop with the paraphrasing?