So I don't really know the average age of most of these answers, but I can try and give some perspective from a younger person:

I go on the internet and fuck around basically 100% of the time I'm not at school. I browse Reddit when I get especially bored, although I spend most of my time on YouTube, as well as making videos to upload to YouTube, which has become a pretty big part of my life recently. I barely get any views on there, and the amount of time I spend recording and editing my videos is pretty ridiculous, but I find it fun and it gives me something to focus my mind on. And I know this isn't something exclusive to "lonely" people, but I, uh...jerk off a lot also.

Typing this out sounds extremely sad and pathetic to me, but probably one of the things that makes me the happiest is imagining in my own mind what it would be like if I did have friends. I run these complex scenarios through my mind, like what it would be like to have someone come up to me and invite me somewhere, or what others would think if they saw me hanging out with someone else. I'll often take a tiny interaction I had with someone else, that they probably never even considered, and blow it way out of proportion in my own mind, thinking of what it would be like if that lead to a larger friendship.

I have some pretty major social anxiety issues, which I don't discuss with anyone and actively try to cover up. I don't really know what anyone else thinks of me, but in my mind I come off as a decently confident person, although on the inside it's a completely different story. It's honestly all pretty upsetting to me, but...I guess it's pretty fun watching a new JonTron video or something like that. I recommend H3H3Productions to anyone looking for a great YouTube channel.