One of my friends is the same. He used to be more outgoing and would invite me to go out often. We used to go on long walks and gym together. In second year of college, he suffered from depression, but it was looking back in hindsight that I deduced he had it without telling us. He was moody and take out his frustrations to people.

He had improved over time but he never finished college. He lives with his girlfriend and working but spends too much time playing videogames, eating junk foods and gained weight. My friend, like yours, just like to hoard stuff and takes videogames too seriously than one should. My friend doesn't like going on walks like he used to. He doesn't like going out much to public spaces as "there are too many people". He uses the Internet space now to socialise than in real life, not that there is anything wrong with socialising in Internet Overall, I fear that my friend is living an unhealthy lifestyle. I think both of our friends have to change their frame of mind.