you might want to try seeing a dr at a bigger facility..like a university or large medical center if you have not already. sometimes one there might have more experience and might be able to provide a better diagnosis. also your friend might need to be able to stand on her own and be able to clearly explain her symptoms etc. having a friend by your side doing all the talking is nice but sometimes that can come off as a "parent" overspeaking for a child. she should be able to provide a clear history etc for herself and why she thinks it is bipolar, or what ever.