Aw, Eggplantlife - sorry you are feeling depressed - smoke that cig if you have to. Sometimes the old tried-&-true is the only thing that helps. It's hard to quit, and if it isn't undermining your progress/too harmful, sometimes you have to allow yourself a step back.
Know how it is to be lonely, and how hard it can be sometimes to talk to others about depression/sadness.

Hang in there - glad you are posting here. Please tell what is most helpful for you right now.