Have you considered making friends with girls? There will probably be less (though still some) of the things you list among girls, depending on what you mean by "inauthenticity". (What do you mean by "inauthenticity"?)

Honestly not sure how. I've never really ever made friends "on purpose" with people in general. That's probably a lot of my problem. Then there's more issues involved when I have to deal with girls, because I have to deal with gender roles or different expectations or whatever.

I'm not intrinsically opposed to the idea. My issue is that I don't know how to:

1. Become friends with people unless I interact with them a lot, and that's not really happening.
2. Become friends with girls specifically, I assume the issues there with getting to know someone will be even more challenging.

You're dealing with a social wreck here, basically.

I also don't think girls tend to be very authentic at my age, but it's not as though they'd be worse than the guys.

Have you considered making friends with upperclassmen or socializing with professors you like? Why do your friends have to be your age?

I don't know how to make friends with people I don't interact with on a more or less daily basis. My friendships have always just "happened", I've never actively pursued them before.

Just how small is this college? Mine had like 400 people and there were types, if not outright subcultures.

600 in my grade, 2000 something total. Maybe I'm just wrong here and am unobservant.

Is there a game store? Those often host gaming events.

I should check for game events in my area, I guess. There's not one on campus or anything.

Do your friends need to be in-person?

Preferably. I don't think I could make a very good friendship via the internet.

This one could be a problem. Are there any known ways around or through it that are relatively easy to exploit?

Not sure, I need to fight it.

Be there to do something else too, and focus (verbally) on that thing (while striking up conversations, of course).

Just about everyone arrives to events in groups and I don't know how to to strike up conversations.