This is really noticeable in ds now and started about a year ago - up until then he was always slim. I feel horrible saying it but it's a real shame he's getting such a belly, I don't know what I can do about it though. We eat pretty well and I have never had loads of biscuits/crisps etc in but obviously he has his own money and I often see those big bags of chocolates like Twirl etc in the bin. He doesn't drink but is always out and in pubs and likes coke/0% beer/cider, so that won't be helping.
He plays a sport but it's cricket so not a massive help I feel and a lot of hanging around, probably snacking. He doesn't drive and walks to college/part-time job around half an hour each way, but it's obviously not enough. He's made noises about joining a gym at uni when it'll be free apparently, but no real interest in that so not sure it'll stick.
Again, I hate to say it but I do feel he is just a bit greedy when it comes to snacks - he worked very hard for his A levels but I feel there was a lot of stress/reward eating probably going on while sitting in the library and now, despite being fairly active, it's gone too far to be shifted without his making a concerted effort, which I see no signs of. I also think he's a bit delusional about what a healthy weight is and thinks as he's tallish it's ok, but I feel it's just going to get worse if he doesn't address it now.
What, if anything, can I say or do?