Going through what I have been has taught me a lot about what is important in life. One thing I can't control is the adrenaline reaction when I get mad. The "fight or flight" feeling can last for a few hours. Even just discussing a stressful incident can set it off.
I have lost a few "friends" but I realize they weren't really friends in the first place (and I knew that, but I try to see the good in people) and I should have distanced myself long ago.