I can see that a person very close to me is extremely unhappy in their relationship and is being treated awfully by their partner. The partner says they have depression and will often lash out (emotionally) by sending huge long emotionally manipulative texts or other end of the scale completely ignoring for days and then acting like nothing has happened. The partner has also threatened suicide on a number of occasions . I can tell that the person close to me is on eggshells around their partner, I haven't seen them socially for a long, long time and I am also aware that they are being financially drained by the partner. So much has gone on since the start of this relationship I could be here all day but really trying hard not to put anything that could out me/them.
I am so worried but I don't know how to help. They don't want to leave the relationship, I think because of pride, money, scared of being alone. My friend is being completed manipulated by this horrible person. AIBU to just stand by and watch. I could (and have) cry for them, I want them back to the person they were before they met their partner.