Another good day...I think. He came and picked up D this morning and took her to this expo for a few hours. I used my alone time to take a hard run and shower. Afterwards we met up for lunch. During lunch we spoke a lot about the marathon he is running. Things weren't tense, at least not as far as I'm concerned. Afterwards we started walking to the play ground. D was running around, he was complaining about having only slept a few hours the night before. Twice he was about to start to say something about feeling guilty for letting her down, she's growing so fast. Both times D interrupted before he could finish and I quickly changed the subject. I know the DB thing would have been to somehow validate him, but I wasn't about to tell him "oh no, she'll be fine" or something like that. I was worried I'd either start a fight by agreeing with him or end up telling him not to worry. Also, I'm not really sure if he was referring to just being gone a lot for work or for breaking the family apart.
I don't really know how to act (if Mahhty was here, he'd kill me for asking again, haha), but today was nice, I was friendly and engaging, but other people seem to DB by just being polite and less engaging. What to do?!?