There are “addictions” and there are “youthful indiscretions”
For example if someone in their youth went to McDonalds in a rebellious stage, that is not an addiction, that was an indiscretion, there is no need to tell someone you might have done such an act.
If you had gone to a casino a few times and played the slots dont worry about it and keep it secret. If you went regularly to Atlantic City and spent thousands of dollars there weekly, then that is an addiction and not an indiscretion