So you've met loneliness - the archnemesis of freedom
I think it comes with the territory so I'd say it's pretty normal to feel like that. I am close to your age so I hear what you're saying, most traders are much older with families of their own so they never really get a chance to experience it. That's a very deep subject though, one could write a massive wall of text and barely scratch the surface. I think loneliness is sometimes the price you pay for that incredible freedom that comes with something like trading. If you think about it, absolute freedom could be the very definition of loneliness, the two are very closely intertwined.
Those of us who are still in our 30s and 20s often don't really know how to deal with that, we rarely know how to fully enjoy all the benefits of trading and we get too hung up on the negatives, it's just a state of mind. Not to be confused with loneliness, but there is joy in solitude and it can be very powerful for self-growth, I think you should embrace and enjoy solitude while you have it. You could easily miss it when it's gone, everything can change overnight and family life can get very hectic very fast.
In your particular case, it sounds like your life outside of trading gets lonely and you're trying too hard to overcompensate for that. Don't think you can fix that by making your trading more "social". Going to all the random social events that "you can get your hands on" can only make matters worse if you don't have a genuine connection with anyone there, when you start feeling alone around other people that's when you have a real problem. Perhaps your social life could use a bit more quality and a lot less quantity, luckily all it takes is just one very close person to change all that, a best friend or a partner.
Whenever one of my best friends starts feeling lonely or bored or disillusioned with life in general he goes travelling for a few weeks, alone, mostly to cheaper Asian countries which is part of his strategy. I don't want to say too much about his winning strategies for obvious reasons, but he uses a different kind of software called Tinder where his offers easily get matched, because apparently Asian girls really like white guys for the sole reason that he's not Asian. So he is currently exploring Indonesia in more ways than one for the 2nd time this year while I'm at home trading Leeds on a friday night.
TL;DR - Get on Tinder. Problem solved.