From a person who has a sociopath sister. My advice.
1. read up on sociopaths, especially the book, "The Sociopath Next Door"
2. celebrate that now you know why she treated you so badly, and that you can see it for what it is... really her defect and not yours.
3. realise you have never HAD a "real" sister, a caring, loving or well meaning sister.
4. Protect yourself. Slowly start to disengage. Dont share anything vulnerable with her any more.
5. Come to terms with the fact they rarely change, heal and that you probably will never have her for a real mutual relationship of caring in the future either.
6. Stop allowing her to damage you in any way. Set limits. Withdraw.
7. Tell someone else, so that you have some support.
8. Support other family members who she undermines or attacks.
9. Consider educating the other family members so as to warn them.
10. Go slowly. Sociopaths are not to be taken lightly.
11. In the end, a total separation from them may be the most positive thing for you. They are toxic to be around.
Seeing as your sister is not a boss in a video game, I'd say that you don't and that your sister probably isn't old enough to be an actual narcissist.
You should ignore them back and be thankful you are not in their circle of victims. Get on with your life and don't fret over not getting attention from a narcissist.
Yes. Otherwise they'll get deeper and deeper into it. At lease they have a fighting chance if you tell them.
Only if you are masochistic.
Yes but do so anonymously.
You grieve for the relationship you SHOULD have had.
yes
A borderline. Essentially a more emotionally reactive narcissist.
Tell him to go and leave you alone.
It is bad and you should run fast and flee town.
Please NO!
You should do some serious self analysis to determine why you would try to have an intimate relationship with a person you have described as a narcissist. Hopefully you will eventually decide that you are wasting your time and should move on with your life and find a mate who is capable of caring for and about you as much as you do about him.