My Friend Seeing Demons?

Okay, so my friend said she used to see demons and everything very badly and she claimed that she really did see them and everything. She acted really weird, like back in sixth grade she was a very depressing person to be around and everything, she used to cut herself and one time when her and a couple of my friends were taking a picture she kept saying (in a very happy joyous glad it's like that way) hey don't I look like I'm possessed or there's something within me or look demonic? We don't know how all this started and everything but it was pretty bad. Now I know some people would say she needs help etc. She has gotten help, that isn't doing to well at all, she did go away to the mental institution for 6 months and everything and now she takes this LOAD of pills. If she doesn't.. let's just say it's like living hell. I mean shes rude, arrogant, stuck, snobby, think she knows everything, she also like to make smart comments and talk about peoples lives when her own is messed up already. She's more toned down now but the whole pill thing still happens and there are at times where she seems like she would still be "seeing" things. I really don't know anymore, the only reason I'm putting this question on here is because the whole trail is literally on it's way back again.. only it's gotten worse. So what do you think?