My sadness and loneliness have become a physical pain in my chest as well. Some days it comes and goes, but most days it's just there constantly. It's unbearable. It causes a lot of anxiety and makes me feel sick. Sometimes I start shaking uncontrollably and hyperventilating and feel like I'm going to pass out. I actually have passed out briefly a couple times at work. I don't eat much to try to avoid throwing up.

It's definitely linked to loneliness for me. I don't have any friends or family to hang out with. When I overhear other people at work making plans to go to parties and stuff, the loneliness gets worse, and so does the pain in my chest and the sickness and anxiety.

Sometimes it helps me a little to go out and do stuff by myself like go to see a band I like or go to a movie. Sometimes nothing helps. I'm going to go to a DBSA support meeting sometime soon to see if that might help at all. You might want to try the same.

I'm sorry about your friend. I don't know the details, so I don't know if cutting her out of your life is really the best thing. I know how devastating it is to lose a good friend.