Had a T teach me that one "fight," one bad night is not the entire relationship. How long have you been married? How many kids and times have you done all the wonderful things you do and she's done her part, etc.?

Hope you feel better tomorrow. I don't know if you truly "want" to sleep on the couch; it's your bed too. I'd go in and claim my half to sleep on. You can apologize for being so upset (who wants to feel upset) and "wish" she weren't unhappy. But I'd be as comfortable as possible tonight, get as good a sleep as I could? There's work again tomorrow and more snow to drive through and frustrations to wade through.