I ask myself the same question. I know marriage takes work, but work should come from both people. Enough with the mind games!
Good, he didn't like the "whatever" reaction about the popcorn. Keep doing that! Let him feel guilty. It's not your responsibility to relieve him of the guilt. It shows that he DOES care about you, but he's confused. He probably likes the attention he's getting from OW, but he's not willing to let you go yet. His actions show that he's doing temp checks, he wants to make sure you're still there. If he truly didn't care, he'd be gone already.
Good for you for going to see your sister! I'm glad you won't be sitting at home letting your mind go wild about "what could be". At least for those few days, try to "forget" H.
Wow, double date? Do your friends know about your sitch?