Anything that makes you feel good can be addictive. I'd put pot at 4/10 for addiction / withdrawals, it's not bad just moody and sleep issues for about a week.
Only if you call it pot. If you call it something else like weed or mary or tree then you’re fine.
Absolutely. I stopped smoking 3 months ago, and I STILL think about it every fucking day. I wish I never started because that thought will always be there now.