Hey Elfy, you're definitely allowed to write a "woe is me" post! We're only human!
I don't really like to go onto the chat for, I think, the same reasons that you don't like the chat. There is for sure an obsession with RPs and the conversation topics just move very quickly. I also think that the boards and the chat consist of, to an extent, a different group of people (the handful of times I have been in the chatroom, I've only seen people who I haven't seen on the forums). So, like, I'm glad that the chat is there and I'm glad that people enjoy it, but it's not for me and I totally understand where you're coming from on the chat thing.
As for people who don't talk to you after you tell them that they broke a rule (even a paltry one): that's them. You can't blame yourself because someone else was acting like a big baby! You were doing your job and trying to be a good admin, they exploded not you! It sucks when it has to be a person that you liked/were friendly with, but if you lost them as a friend over something as paltry as that, then they probably weren't worth being your friend anyway.
It sounds like I'm telling you a lot of "it's not you, it's them" stuff. But like it also sounds like you might could maybe possibly use some help with the being in public thing. I'm not really certain if that's something that you could/should see a doctor about but I'd like to ask you to consider seeing a doctor over that. I'm not your mother, you said you're happy with your introvertedness, but like: consider it! If you could lose your flat over just losing one person then it could be that your shyness is getting in the way of you living your life (okay mom rant over).
I'm sorry that you lost a friend over being bisexual. I wouldn't say that I've lost any friends over being queer myself, so I don't know if I can speak on this as much, but I honestly feel the same thing applies: they weren't actually your friend if they let that get to them. And I know that that sucks when you're friends with them for so long and you were just trying to be open and be yourself.
Anyway. I doubt that any of that was helpful. Not only did I respond to like .2% of the stuff you talked about, but my advice is rarely sage. Like I said, though: you're allowed to write a "woe is me" post, so no eye rolling on my end of the screen! Feel free to shoot me a PM if you need a ear to vent on and stay strong! I know that we're not buddy-buddy/BFFs to the grave, but I wouldn't classify myself into the group of people who don't like you (in fact, I think that that group is smaller than you think!)!