How can I get past the psychological addiction of smoking?

I KNOW that I need to give it up. This isn't something new, I've known it for a very long time.

My boyfriend is 24+ hours smoke-free (using Chantix) and I'm mid-way there myself....ready to give it my all, use the meds, make the committment...but at the same time I'm scared....of failing.....

Help

(DanaZ: Sorry to read you had a bad day recently.....I miss you! And I worry when I don't hear from you *looks sternly atcha*