Yeah Bluestar started to go crazy when Tigerclaw tried to murder her and Fireheart saved her. That then made her think that she could only trust Fireheart and that starclan had turned their backs on her. then she started to regret giving up Mistyfoot and Stonefur because her clan was fallign apart in her mind, she thought it was full of trators and so on.
Hope that was enought i havn't read the orignal serise in awhile because i'm trying to get throught The power of three. so i dont remember exacltly