I was kind of in the same position as you. Ten days before we were to leave on our Christmas trip, my husband of 27 years told me he was moving out in January and was not coming on our trip. We hadn't been getting along very well, but this was extreme and a complete surprise.
So, I took our four children and had a good time. It was different, but isn't every trip?
On Christmas eve and Christmas day there were moments when I thought I was going to break down and cry. But there were angels in the park that day. Christmas eve we waited in line with a single traveler and he was totally content being on his own. Christmas day we had dinner at Chefs DeFrance, and again there was a very content, happy, solo traveler dining at the next table.
I would be a lie if I said I'm not scared of my future. But I will never let my soon to be (I guess) ex-husband's actions keep me from something I love.