I Love the 2-step, it is my favorite dance. Dancing brings Joy and is a great way to take your mind off what is going on in your personal life.
Detachment is extremely hard. The bible talks about the two becoming one. I believe people are wired for personal intimacy. Your entire life is wrapped up in that person. You share children, finances, dreams for the future. There is no light switch that you can hit and become detached. Detachment is a slow and difficult process.
Personally, what helped me the most was getting a formal custody agreement that allowed me to live a single life %50 of the time. During the in-house separation, my wife was living like she was single, and I was living like a single parent. GAL was difficult and I always felt guilty for not spending time with my kids.
If I could have a do-over, I would have formalized a custody arrangement with my W and started building my single life right away. Note, that would not include dating. It would include getting out of the house on my days without kids to do something, anything. The sooner you move forward with this part of your life, the easier it will be to detach.
One other note, nobody around here 2-steps anymore. All the young people Salsa. Salsa is nowhere near as fun as 2-step. But, "when in Rome...."