Arsh, divorce is definitely the end of the life you and your husband had together the last 15 years. It's a tragic end that seems worse than death. But your husband isn't thinking at all about the long-term consequences and he has no idea what his new life will be like. What if it's not so great? I still think he'll come back in a year or two, but the uncertainty leaves little room for comfort. I know it's not very helpful when people tell you he'll come back because everyone says that about my husband but now it's been almost ten months and he's not back.
It's good you know you can feel complete with your daughters. Yes I have no plans to date anyone either. I've never done it. I had a long-term partner for eight years before I met my husband but it started as friends for over a year and then it was mostly long-distance. It was a guy from your part of the world who was born in the US. Other than him and my husband, I never ever dated. I was raised to be conservative and I could never overcome it. I guess we all change over the years so as you say, who knows what the future holds.