I was working in Lubbock for two weeks right after Christmas and the temps were like 17 Low and 45 high... and I wore just a t-shirt, while the locals were in heavy coats. It was a welcome break for me. But, perspective on cold is something you have to get used to. I work outside quite a bit and that helps (however when it gets down to 60 in September I'm in a coat after getting used to 90's in July and August).
Hope your girl gets home to keep you warm soon, and hang on at work for a while. You never know what will happen in a restaraunt (spent about 7 years in 'em) each is its own crazy little world.