Another person should not be posting pictures of you like that without your permission. And this friend is also asking too many questions about you too.

Your alarm is picking up red flag warnings and it doesn’t mean you are being paranoid. If anyone posts something on your social media that you’re not comfortable with you have every right to delete it. Same with anyone requesting to friend you so they can look at what you share about your life with your friends.

It is possible that this friend who is friends with this guy is sharing information about you that you prefer he not know. That means you need to stop sharing things with this friend that you prefer this guy not know.