Damn, I saw the 'burn bridges' part of the cycle happen too.. when people try to do that to me, I just ignore it as I know they're just trying to push me away and keep talkin' to them.
Social stuff can be hard to deal with though. I have diagnosed agoraphobia and it's really hard to explain to people. I have to talk with people on the internet for a while before I'm okay with meeting them, because it doesn't matter if you're a 4 foot tall girl or a 7 foot tall dude, I'm afraid of you unless I feel you're less of a stranger. And it's this general fear that's hard to explain to people. It's not like I think you're going to stab me or rob me or anything.. I'm just afraid of you. At restaurants I try to sit at the seat that has it's back against the wall and can see everyone else. I have to inform people that I MUST have the option to leave whatever they want to take me to at any time. Sit down restaurants are the worst for this because my anxiety will build but I can't step outside because I don't want to look like I'm dine and dashing. PAX meetups are a sort of personal hell that I think I probably do a good job of hiding. Etc.
While I was in Vancouver I had an invite to go to the Canadian Videogame Awards and I had to skip it because my anxiety was in overdrive just thinking of all those people there. Missed out on being able to meet David Hayter and both the Shepard voice actors and shit over that. It sucks. So I try to understand when other people have social difficulties, even when they're the not the same exact anxiety.
...
Back when I was younger, we had a guy we made amateur games with on the internet. He befriended a lot of people, but years into it he started a cycle of threatening suicide and writing megaposts going on about how he was persecuted and such, coming back, threatening it again, etc. We'd try to help, but each time the cycle started again he'd burn bridges with one forum and then go to another. And each time he pushed away only the people that got the closest to him, claiming they were 'spies' from the previous forum. He accused me of having a network of spies that kept tabs on him, and accused his ex gf of the same, because he wanted to be in control of all aspects of her life. He sent rage letters to studios that localized any anime he liked that would now be 'consumerist' instead of underground and Japan-only. And then one day he left a serious suicide note / death threat to Funimation as the MOTD of his newest forums he ran and we hit every email we knew of. Someone finally got in touch with his mom and she intervened, and he was hospitalized. We didn't hear much about him since then, all I know is he's still alive via someone who didn't get deleted off his friends list on one of the IM networks. I'm glad to know he's okay, even though he'll never talk to me again.
It's practically a script when you look at it happening elsewhere. Not the exact same events, but the cycle of befriending -> bridge burning -> collect new friends -> bridge burn. And it always hurts because you want to try to help them, but helping them would mean they need to start acknowledging the reality they should belong to and not the one they want to keep going.