Basically yes. When around her you want to be friendly and if she engages you in conversation listen and validate (when appropiate). Being cold and ignoring her would be a mistake. It would only go to prove she made the right decision because your trying to punish her

Other times GAL and don't be so available to her. Not because your trying to punish but because your living life to the fullest. I don't really care for the term dark because that's more for when you need to cut off nearly all contact with her and not something you can do living together and/or with kids. Pulling back and being less available is more where your aiming for(again, not becaue your punishing her but because you have so miluch life to live). Give her space to figure out her chit while you move forward.

Yes it hurts but remember your goals. To become the man only a fool would leave. Would that person be pissy and moan because someone is leaving them? No, they would see their value as an individual and realize they have a great life to live no matter who they are with. Another point to make is that she likely blames you for hwr unhappiness. As long as you stand ad an obstacle in her life she can never see the true cause of what's really wrong with her. That's why letting go is so important and removing pressure from her (some will always be necessary).

Accept what is, let go of what was, and have faith in what will be