I read the whole thread. One hell of a story!
This whole situation strikes me as just a simple act of revenge of certain kind.
Someone finally gets it. From what it sounds like, she's pretty pissed off at you and she grabbed the first available guy to get revenge on you. Although she'll never admit it, her actions have caused this guy to get hurt. If anything, I pity the dumbass with the broken ba11s since he's so fvcking clueless at what is going on.
Now for your situation. This has already escalated beyond repairable. There's a lot of damage done and it's best if you move on from this woman. Keep yourself from calling her, seeing her, and leave the guy with the broken ba11s alone too. Don't worry, they won't last. She's rebounding with him.
What you need to work on is getting over her. Take some time to yourself and cry all you want. While you're doing that, convince yourself that it's over. She's just one woman out of thousands.
After that, start on a new path. Get some new clothes, new hairstyle, piercings, or anything that will make you feel like you're moving on into a new part of your life. Then start dating some other women. Rebound if you need to.
Also, getting violent over some woman shows that you're insecure. Women are turned off by insecurity. Keep your emotions under control and things will go much smoother.
Last, keep up reading and practicing what you're learning in the DJ Bible. Things will get better.
Good luck.