Depressed

Had a wonderful morning today. Wife wanted to go grocery shopping so our youngest invited herself along. I figured I'd go along to keep her out of mom's hair and was told by my wife that she would rather go alone. When she left she took our youngest with her. Not very alone. I can only figure that she didn't want to be around me. So now in the past 3 months, she has told me that she no longer loves me, the only reason she hasn't left me is because she has nowhere else to go, and today that she doesn't want me around her. What's next?