Am I being paranoid?

I received an Instagram add from an ex-friend’s friend. I don’t have a tie with this individual besides an ex-friend I parted ways with a year and a half ago. I parted ways with my ex-friend due to her and another woman verbally attacking/accusing me of something that never happened. Alcohol was involved and after the incident I decided to discontinue drinking due to the instance being pretty horrible. I recognize that alcohol can sometimes cause individuals to say and do things they normally wouldn’t do when sober; however, there had been other instances with this ex-friend doing the same thing to other individuals, so I decided it was best to part ways with her.

A challenging thing is this woman’s husband is friends with my boyfriend, and after the incident I became insecure and didn’t want my boyfriend spending time with her husband to go drink due to being upset of how his wife treated me. I have since realized that was pretty immature of me and let my boyfriend know I’m okay with him going to have a drink with his friend, which ironically my boyfriend no longer wants to spend time with this friend due to no longer wanting to drink, as we’ve both kind of grown out of this phase in our life.

I know I will never fully know why this friend of my ex-friend added me unless I asked her; however, I can’t shake this paranoid feeling that I was only added to be checked on since I blocked my ex-friend. Am I being paranoid?