I need Friend Advice.

The best kind of communication is to go up to the person and address to them the problem, या whatever message आप wish to convey.

I know that you've कहा आप don't want to say it, but it's better off telling your friend द्वारा your own self other than लेखन something to her, या having someone else say it for you. If आप really think that this person is making her "unwell", as आप say, then it has to be said. If आप don't say anything right now, what's going to happen later? Things will only get worse, and I'm sure that आप already know that.

It'll be normal for skepticism; who could respond positively to those kinds of messages at first? Things like this are कहा all the time, but if आप were really good फ्रेंड्स with her, she should have faith in आप and not cut off ties just because आप have something important to say. If she doesn't believe you, tell her how she's been अभिनय lately: whatever has been out of sorts. If she doesn't contact आप again, then she will have to find out the hard way that your words were what she should have followed and listened to.

And I could infer that आप want your friend away from that man as soon as possible, but if she's that close to him, आप can't immediately pry her off. Things like this take time, and आप need to trust that, if she understands your message the way that you're conveying to her, she will soon part ways.

Don't be aggressive; be assertive. Good luck.