I have a friend I've known for many years who I suspect is being controlled by her partner. Despite an abusive childhood she managed to forge a good career in medicine but has had a series of failed relationships, the latest being with a man about whom little is known. He has no assets and told her his ex took all his money and his entire family are dead. Most friends, family and colleagues who initially raised concerns have been dropped, leaving her with just the very few who are kept at a distance apart from one who is very well off. He seems to encourage this friendship. He calls her constantly if she is out but blocks her calls if she doesn't answer immediately and tries to ring him back. On the few social occasions she has bought him along, he has been disruptive, seemingly high on something (which she denies) and causes a scene. There have been allegations made at his workplace of sexual misconduct but she seems to swallow his narrative that the women concerned are after some kind of compensation.
There were a couple of occasions earlier in their relationship when paramedics were called out as she had apparently fallen after arguments in public. She lives a very frugal life, buying everything for herself from charity shops etc whilst buying him designer clothing.
I've tried to respect her choice and hoped the relationship might fizzle out or improve and I've tried to open conversations about his behaviour but this just gets shut down and I'm afraid she will lose any support she might need in future. There's nothing more I can do is there? Just feeling sad about the situation and where it may end. Anybody else had similar experiences?