I'm not entirely sure, personally, if age would be a factor

I find his reasoning behind why he doesn't necessariy want to continue this friendship somewhat shallow, and honestly I don't believe that you deserve to be told that.

Sure. Interest are great discussion points / get together things for any friendship.

But there's more to it than that.....I think.

Things like talking about past events / how your day was / what you plan on doing the upcoming weekend....

I just think it's rather unfair what you were told if that in itself was the only reason.