I picked up smoking while in college. I tried quiting many times but I've never succeeded until the day my doctor told me "you'll never get pregnant if you don't quit". That was all it took. I've never picked it up again and that was 5 years ago. Although, there were times, I feel like having a cigarette. Then I thought to myself, it took me forever to quit why would I start again.
Hang in there, it does get easier. Hugs.