What should i do if i'm feeling depressed and have almost no willpower to do things, its gotten to the point where i would welcome the idea of falling asleep, to never wake up ever again? this seems to happen when i have milk (lactose)?

I wouldn't think lactose intolerance would be the cause of your mental state. You must see a psychiatrist ASAP before your depression gets worse. A combination of psychotherapy and proper medication will get you on the right track but don't delay in getting help. Regular exercise can help immensely. If alcohol is a factor you must avoid it.

You may have a severe allergy to dairy, not just lactose intolerance. Please see an allergist/ENT for diagnosis and treatment, and have a complete physical exam to rule out any other illness. If you find out you are not allergic to dairy then please see a Clinical Psychologist for psychotherapy and a Psychiatrist for medication.