Mature seems...hard. But then again, there's usually so much DRAMA when people don't do it, I suppose. That's how it seems to be at school, at least.
And well, if he is, then I suppose he'll have lost out. But, well, you don't know anything for sure, yet. Being patient like this is TERRIBLE though, when you're worried.
Would anything distracting help? My cousin usually forces me to play chess with him when he thinks I'm upset by something.