I don't want my narcissistic former frenemy to know about my boyfriend

Hi:

I recently started dating someone who is a much younger than I am. Meanwhile, there is a former ex friend of mine who hates me out of jealousy and is narcissistic. However, she likes poking her nose in other people's business along with gossiping about them. She has even read my posts on an external forum that is not part of 7 cups. Therefore, I am very careful what I put on those forums because a narcissist will likes to gather data so they can use that to destroy other people.

While there is a love and date section on this forum, I do not want to post anything on there about my boyfriend and I and especially the act factor because of the gossiping. When we were "Friends," she told me some pretty sick things about people that were not even true.