Rainbowzz,

I know this sounds simplistic but if you really feel bad about overreacting, you need to apologize. I know this can be hard for you but this could be a real opportunity to see that is you humble yourself a bit and say you are sorry, you may not lose this friend.

You say you get writing jobs so you can write all this out first and practice a bit before you do it. Or maybe you can even do on email or IM but in person will mean more if they can see how sorry you are for misinterpreting the joke and then say you often mis interpret what people say and will try to ask for an explanation before you get all riled up. Not that you will or maybe can but it will show intent and I think if you could you intent to be better in general with your reactions.

I'm sorry you are having to go through this but the last thing you need is to curl up into a ball. I would love it if you could do this and feel the experience mitigating a bad situation and taking some power back in the process. I would hope that it would give you a powerful feeling that even if you over-react, you can possibly unwind the damage and move on. I really hope you give this a try. Keep in mind, those of us who don't specifically suffer bpd sometimes have to do this very thing on occasion (you bpds don't have a lock on overreacting!) and yeah, it's uncomfortable and a bit embarrassing but salvaging a friendship is totally worth it in the long term.