A2A, I’m getting a bit tired at the moment of explaining game-playing behavior. Suffice it to say that if a guy says he doesn’t like you, you should take him at his word until and unless he tells you differently. Stupid behavior like that doesn’t warrant you going to the effort of trying to dig out his “true” meaning, when that meaning at the moment probably just revolves around sex.
About the selfie, a lot of people hold on to selfies they take that they think look nice and just send those. It’s often just too much work to set up and snap a decent selfie pic in any given moment. If I wanted to take one now, I’d have to reach over and turn on my light. Easier just to dig into my stash. He probably just sent it thinking it was a good pic and not really caring so much about the content.