I have done well with GAL and detach on days that I don't have D2, but when I have her, I am in pain knowing our family is not together. I want to share these moments with WAW, and it hurts me that my D never gets to experience having fun with both of her parents.
Let me give you a different perspective on this. My H has always worked long hours and traveled a lot, even in our happy days. When my kids were little, we did a lot of things and had a great time without him. The only difference in this scenario and yours is the mindset. Don't let thoughts of W ruin the great experiences available to you. Enjoy your moments with your D, they won't come around twice.