I perseverate with anger over certain scenarios, usually the neighbors. I picture going outside and confronting them, and these imaginary confrontations involve violence. I'm too rational and prudent to act on the anger, but because I don't it stays active and eats at me and I can't stop running the violent scenarios through my head, sometimes for hours. That's the dominant theme, the inability to calm down and move on, even if the stimulus is long gone.
To the OP: it sounds like you have other issues with jealousy or fear of abandonment, and on top of that your AS is causing you to stay hung up on those issues longer than normal.
Unfortunately, I have trouble coping with this inwardly-turned anger and can't offer any suggestions.