STBXH moved out last weekend (long time coming, mutual agreement, best for everyone as living together was getting toxic). He picked up DS for first overnight this afternoon with him due to get dropped back tomorrow evening.
I feel bereft, which is ridiculous as he will be having a great time with his Dad and I have spent longer away from him before but this feels different and I am so so sad.
I guess it is partly because it is the first time since the official split, and I know we won't be living together as a family again but I had no idea I would feel this bad