Too sensitive?

Played 4 games against a long time member. Won two, lost two. My chat consisted of"Thanks for the game!" and " Nice play1".  No response.  Continued.  Went back after a few days and challenged for a game.  I learned that I had been blocked from challenges. Have I violated a rule of manners without realising it?  Am I too sensitive...? Mountain out of a mole hill? Move on with my life?

There's no way to know.

What you should worry about is looking at games afterward to get better.

For instance, your last game with Maryan2102, you had a chance to turn the game around.

Thank you both for your  time and input.  Had I really screwed up you would have said...  Dropping it with a clear conscience...