The most likely cause for your low health and weight loss
is uncontrolled diabetes
If you don't control your diabetes you will not only loose khealth and weight but can also develop various complications which can be fatal or disabling.
Remember,for control of diabetes,you require proper medications along with proper diet and dietary restriction as well as regular exercises.
You must consult a diabetologist
or an internal medicine specialist and get yourself examined and investigated properly.Once you are investigated,proper medications and plan for diet and exercises can be advised to you.
In he mean time stop smoking
and alcohol and avoid sweets and deep fried and fatty foods.
Quit junk foods like burgers,pizzas and colas.
Start doing regular aerobic exercises
for at least 40 minutes a day.
I hope it helps.