I am tempted to think not interested. I ended up texting him an article / quiz that I read on Sunday morning (on a topic that we'd discussed). Granted the article was long and required some thought (and time to the take the quiz), but I didn't get a response back until that evening! I was pretty irked and just responded to his text. He could have left it at that and not responded at all, but I got another text from him. And granted, I could have left it and not responded, but I responded this morning with just a one line about how the quiz is tricky.
I think I want focus on going out with other guys. If he doesn't ask me out in the next few days for this week, I am writing him off completely. I like him, but if he's not making any further moves, maybe it's just the way it is meant to be.