Nail hit on head there. I feel exactly the same in those situations.
This year I'm by myself (apart from dog-sitting a Jack Russell) watching TV, and, avoiding alcohol. Dry start to 2014 :)
I've done the same, and I know it's tough. I joined a gym, not really made any friends, but at least it gets me out of my home, I can smalltalk with people there, and the exercise is obviously good for you.
Oh yes, I get this in work a lot.
"You went on holiday by yourself? Riiiiiight"
Yep, I packed my car, went where I wanted; camped, hiked, ran, swam, climbed. And had some beers in the evening. It was f*cking great. Next question..
Bonnie Tyler - "Lost In France"
Robbie Williams - "Come Undone"
Radiohead - "No Surprises"
Coldplay - "Trouble"
Buzzcocks - ""Ever Fallen in Love (With Someone You Shouldn't Have)"