Dear Sir/ Madam If you are suffering of persisting pervasive sadness or irritability with loss of interest or pleasure accompanied with weight loss or weight gain, insomnia or more sleep, slowness in activity,fatigue or loss of energy, feelings of worthlessness or guilt, diminished concentrate, ideation of self harm then most likely it is depression. Drinking and smoking helps to feel better so many take it as self medication. Since withdrawal symptoms mount the problem it often lead to frequent intake which may take the form of dependence. you should consult qualified psychiatrist to control your symptoms, at the same time try to find out any reason for being depressed and address it properly. If your drinking pattern is that of dependence then relapse prevention measure to be taken for required period of time adequately.