HeroIam,
Ugh tough one. You are at a crossroads it sounds like if whether you want to continue standing or to move on. Personal choice, I can only give you things to consider as there are no real words of wisdom when you are at a crossroad in your life or marriage.
For me when I came to this crossroad I had told myself I was moving on. My feelings wouldn't let me, I then started asking myself questions such as was I at a point where I could see my H with another woman and not care, not get emotional, or jealous? I wasn't. I then asked if I started dating could I wholeheartedly put my all into the relationship? Could I leave the baggage from my marriage and not bring it into a new relationship? Would I be okay introducing this man to my H and my kids? No. Was I ready to bring a man into my kids life that was not their father? No. Everything told me I was not ready to emotionally or physically be done with my marriage that I had to fight for it and give it my all.
I craved intimacy, I fought and still fight loneliness, I crave to be completely restored in my marriage but I also know this is just a season. If you can honestly answer yes to those questions or some other similar questions then you know what to do. Whatever brings you peace with no regrets is the path you should take. I understand completely your struggle as I have them too.
Denjef31