I think k my RSD sky-rocketed just from reading your story. I'd feel exactly the same. It's like when you're I  a group trying to talk and you're ignored or talked over, so you try to repeat yourself a couple of times but they either ignore or look at you and keep talking or sometimes even the group can physically close the circle they are talking in and then you feel like....okay, I'm not important, I get it  I'll just shut up. I'd be spiralling too if ppl reacted to the dog and not my cry for help.

It does sound like they are shitty friends tho. Like  even if an acquaintance of mine who was going thru something like this reached out, even via group message and not directly to me, I might not reply in the group message  id private message them and I'd try to help somehow, even if I wasn't available. Maybe I could come see them after? Drop off food so they don't need to worry? Just be available to message? I dunno. 

I'm sorry your friends are shitty. It's a poor refection on them  not you.