Hello, Emma 101:
I also don't know how involved I should get. The whole thing gives me massive anxiety.
Much like
zachira, I am so sorry you are faced with this. Even so, I just have to applaud you for being willing to continue to put forth effort into understanding your brother and friend. In my opinion, that's true love, but is there any reason why you need to get directly involved at all? I guess the next question would be to ask you, would doing so increase or decrease your massive anxiety? The main thing is to focus on your own self-care:
This site is rather HUGE, however, there are many, many articles related to bettering your relationship with the angle of using healthy communication techniques, setting needed boundaries, and validating what is valid. You will find these articles in the right-handed panel on this board. We can help you with questions, point you in the direction of additional resources, or just be a sounding board.
Tell us more about yourself and your story. It helps you to get it out, and it helps others when they see that they are not the only ones suffering. We look forward to hearing more from you.
Keep writing, keep processing, keep learning!
-Speck