This is so over dramatic. It was clear she wasn't enjoying being in a group. It's her career and if she wants to go solo then she's entitled to be able to do that. The girls are fine with that, like someone has said: unless we are one of the girls we don't know the friendship status in the group.
Fifth Harmony are still there, and if you were a true fan, stop whining and be excited for new music. Also, it's clear the girls didn't write that message, their management write all their posts on the 5H Twitter.
Camila or the rest of the girls have done absoulutely nothing wrong. Just people making drama over this situation for no reason other than a quick laugh