I know for me, if I think I'm right about something or if I want something bad enough, I can and probably will dig my heels in until I get what I want. I actually did that in my quit because I wanted to be an Ex smoker more than anything, I didn't want to continue smoking and let my copd get worse so 607 days later, I am saying quitting smoking is definitely doable and absolutely worth all of withdrawals and mood swings to be free from the crutches of tobacco, so be stubborn , dig your heels in and take back your life.
Marilyn