Do you think that I should tell my parents that I smoke?
What would be the reason to tell them you smoke?
I want to brag about it to get their attention
If you want attention from your parents, talking to them about smoking is probably a bad idea. They might get angry that you smoke. You should stop smoking and talk to your parents about other, healthier things if you want their attention.
I'm not listening to you.
You should at least consider it though, because it is very deadly to smoke. Do you want to get lung cancer or worse just to look cool and get your parents attention? There are better ways to do that.