It is important to remember that when you quit smoking you are changing more than a habit but a lifestyle. As a smoker your life revolved around smoking, without that negative influence your life will be much different.
Because of cigarette use you may need to reprogram yourself when dealing with life such as having fun, managing stress, losing weight, and getting healthy. For so many years you have been neglecting your mental and physical being. You will need to add new things and routines to your life to help with the day-to-day living.
Do you have the tools to manage stress in a healthy way? It has been a long time since you have dealt with stress without smoking. Stress is typically the number one reason people go back to smoking. YOU NEED TO LEARN TO MANAGE STRESS! Consider that 3/4 of the population manages stress, to some degree, without smoking.
It is always important to remember the big picture and not fret the small stuff. One of the best ways to combat stress is to smile. Find ways to relax and I know you have heard it before but get physically active. You are making a lifestyle change so take it seriously and pursue it with all you got. Get healthy, manage stress, take up a new hobby, and get back on track to obtaining those goals that you once had.