WWYD...

The whole time?

I would say that she is overexaggerating and think that she isn't quite as good a friend as you first thought.

Am guessing that's what you're thinking but not what you want to hear though? Am so sorry...

Consider the options, wonder why she has been walking on eggshells? why this person felt the need to tell me this (any ulterior motives), obsess about it for a bit then decide to either ignore it or ask the best friend

Sorry that's really no help is it, but it's what I'd do

I think she's probably exaggerating too but I feel a bit cheated because where I feel like I've been honest about everything throughout our friendship like I think you should do with your BF, it's obviously led to her feeling like she has to walk on eggshells around me.

Some other things have been going wrong in our friendship to the point where I don't consider her my best friend anymore. I want to be grown up about it and take some time away from her so that we become more casual friends, but my (immature?) instinct is to call her on it and have it out.

Biting my tongue is really really hard.

It depends on if you still want to be friends with her ultimately.

Personally, I would have it out with her regardless but then I'm a bit too hot headed about this kind of thing and it would really upset me to hear something like that said. So my advice (that I wouldn't take myself IYSWIM!) is:

If you aren't bothered anymore then I would have it out with her but if you ultimately still want to be a 'detached friend' who you see every so often then I would take a step back and have some time away from her. Maybe after some distance you may be able to word what you want to say better?

I don't know why she thinks she has to walk on eggshells, she insulted my H and I said I didn't want to hear it but that's no reason to walk on eggshells especially since it was a few months ago and she feels like it's been going on since the start of our friendship 7 years ago. I found out as she posted it on another forum...a few months ago she posted me a link to something on this other forum, it's a specialist forum so when I wanted to find something out on that topic I followed the link she sent me to get back to the main page, and her other post was on there, so there's no motivation.

I want to ignore it but a large part of me wants to send her an email with just the link to her post.

Well personally I would want to know the reason why. If I was in that situation I would definitely ask why she feels that way so that I could at least have a chance to either see it from her point of view or defend myself. That way you could also see if she is just being a bit overdramatic, or whether there are things that have happened that maybe you can look at in a different light. I don't think you need to 'have it out' with her as such, maybe just meet up for a coffee and ask her why she feels that way. Then if she is just being over the top you can decide whether you are actually bothered about maintaining the friendship at the level it is.

Not sure if that's a help but it's what I would do in that situation - I wouldn't be able to just leave it even if I wasn't actually that bothered about the friendship anymore! ? That is, unless I was certain she was just being overdramatic in which case I would take a step back because I can't be bothered with people like that.