How funny you should mention that. I've noticed the exact same thing. It's not "winter blues"...I generally don't get those. This is something I haven't felt for a good 5 years or so. Almost numb. It could possibly have to do with the fact that this term is complete hell and I spend most of my time working on schoolwork. It could also have to do with the fact that I'm crazy about a woman I could never ever have, and she's crazy about me but circumstances prevent anything more than the occasional stolen kiss. Whatever it is, it's a very dead feeling. It's like being acquainted with an old friend you never liked. Yes, you had your times together and it's good to see him and all, but you'd rather not have him stay for more than a few days or so.