Revoke your dependent on smoking. For now when you're stressed or pressured you lean back to smoking. It became easy for you to rid your self of stressors or technically speaking tolerate them, because smoking doesn't resolve your issues or stressors. It helps you see beyond them and tolerate them. So what you have to do is be creative on finding alternatives that can help you. maybe not exactly the same result you get out of smoking. Try to deal with stressors in a healthy way.