Stress and smoking

I had set my quit date on the 1st of January as my New Year's resolution. But I was thinking about it so much, that I want to quit, it had become almost a guilt-like feeling. On Christmas eve I lit a cigarette, smoked half of it and decided to try to quit a week earlier than planned. I am on day 5, which is nothing of course. I hope I'll be able to say I am on day 365 but I am afraid that I might slip if I find myself in a stressful situation which is when I smoked most - not with drinks etc but when I am stresses, which is quite often. I don't feel like i miss the nicotine, i drink a lot of coffee too. But i miss the lighting a cigarette when stressed or overwhelmed. I have kind of associated smoking as a stress reducing activity that sort of deludes the stress effect. I never thought it would be the case though, I was smoking 2-3 cigs a day for 15 years or more and always said "I can handle it", "I am not addicted", "I can quit easily" but the last 6 months, to my surprise, I started smoking 20 cigarettes/day (rollies).