Don't say anything about the photo. What good could possibly come of that? Confused people are frequently inconsistent in their behavior. Don't take it as a sign of anything other than that he is confused and conflicted.
I second the advice to study pursuit and distance.
But I think the most important thing is to differentiate yourself so that your mood and emotions are not tied to his behavior and response. I didn't distance myself in the way typically recommended here. I tried it for one day and it was a disaster. But I did work on owning my own mood, learning to self soothe so I wasn't looking to him for emotional support, getting a life, etc.
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16