Basically, I have this friend, who I've been close too for years, but over the past 6 months/year, she's gone suddenly very quiet around the group, never joins in on conversations, copies things me and my friends do, changes opinions she has, too fit with ours when we have opposite views&It's kind of like she's afraid too ask if she can go too the toilet on a break, or get some toast or something. Why is this? Can someone help?