Someone will give you some tough words on your interaction(s) since yesterday. I am just going to say, what are you doing?
And here is an idea: Who is your favorite actor or person of interest that you admire? Be that person when you are with W. For me, I like Diane Sawyer...have you ever seen her interview people or see her with people like her late husband..if not look at a picture of her and Mike Nichols. She does this 'lean in and hand on chin' that I think of when I think of someone who loves their H, even when I do not like my H and need to 'fake' it.
Tell us who it is and how you become that person today at the fair + stay for the whole thing! Just for today...just get by and then figure out what you need to do--go dark or detach or GAL or whatever you are going to do to.