PennyJo, it wasn't the smoking. It was love of you and concern for your long term health that had your parents trying to get you to stop.
Like any addiction, stopping is not easy. I've never smoked. Didn't use drugs. Seldom drink. I tell people who discuss "why don't they just stop" that my addiction of choice is pancakes. Stopping isn't easy. I know how difficult it can be. In the case of food addiction, however, there is nothing like Cold Turkey. It is relearning moderation, appetite control, body signals long lost that clue one they have had enough.* As well as relearning what is body nourishment and what is trash calories.
A smoker friend was often on my case for being overweight. She was clearly able to control her eating, she said. Why couldn't I. Couldn't get her to see that her smoking, in a great part, was her weight control.
So I've always understood the difficulty of quitting smoking, quitting anything addictive. In fact, I was once told by a medical practitioner that I had an addictive personality. Why? Because I typically read a book a day for over 40 years. Not the worst of addictions, but there was certainly a lot of "productive" things I could have done with that time.
Wish my son didn't smoke! Spouse watched his father die of lung disease. That was his incentive to quit long before I met him. Didn't stop his brother though and his brother died of lung disease as well.
I am happy you are quitting. It is a good thing, but more than that, I will be your friend no matter what happens in the future. I want what's best for you.
* See, I'm still defending food addiction aren't I? Yup.