I know what you mean. H left this weekend to go on that ski trip and being home alone all over again just set me right back into depressed mode. I was reading the BB one night and came across B2K's recent development and it effected me so hard that I had to quit reading the boards until today.
I basically empathized so much with her sitch that it felt like I was living her life for a little while and feeling her pain completely - felt like I was in a different world. I suddenly remembered after a little while that I was ok and that stuff didn't really happen to me... that H was home and things were going well. Had to snap myself out of that, it was very weird and powerful.
