Most Helpful Guy
I bet age doesn't make a difference to him. Well if he wants to play that game in real life, then okay. Play that game. He sounds like he doesn't really know what he wants. I'd still talk to him over text, like how you normally would, but when you see him in person just a simple waive or a hi and then move on.
Sometimes I do the same thing with my texts. I normally don't respond because I'm busy at the moment and I totally forgot about that text. I wouldn't read much into it. Be as serious about this relationship as he is. Don't be the "engine" to this if you know what I mean.
Take it as it goes and treat him like a normal friend or acquaintance.