Please, I need advice.🙏

I've been with my fiancé for 7 years, we recently got engaged. We've lived together 4 years, have a daughter and want more kids. Life is good.

I'm 25 years young and my fiance is my only long term relationship or real boyfriend.

Over the years there has been a guy who has been trying really hard to get a hold of me. About 5 years ago my mom said a guy came to her door looking for me. My grandmother had received a phone call looking for me. My sister has had this guy contact her multiple times through Facebook. And even my Aunt told me at my daughter's first birthday that he has contacted her saying "I've been trying really hard to get in contact". I have a very uncommon last name so multiple cousins have told me the same thing.

It really creeps me out. 1to 2 years ago my fiance's good friend showed him a Facebook profile of a guy that I feel like a seen in a vague dream. Someone I was talking to for maybe a month of my life but never dated. He had pictures of me and him posted in 2012, but these pictures are from around 2006. There are 3 photo of us out on a boat party. Slightly embarrassing only because I look so young, his arm is only around me in two and in all I'm smiling at the camera. What is creepy is the caption that says "My beautiful and sexy (MY FULLNAME) ".

My fiance who is 29 can tell the pictures are old and never questioned that. He is a possessive person but not at all controlling. He is a protector and really is my best friend. He has no idea how much all of this has bothered me. He has no clue about any of the attempts this guy has tried to make to contact me. This person is bothering my extended family and they know how my fiance would react so are sure to only tell me. I wish this guy would just leave me alone, take the pictures down of me or at least the comments.

I haven't had Facebook in 3 years, I do practically 0 social media.

I posted this before but there has been more attempts to contact.

I'm scared to try to find him and tell him to leave me alone because I don't want him to get a hold of my IP address and personal information he could use to find me.

Any detailed advice would really help. How should I tell my fiancé? I thought this person would just go away once I didn't respond. Ughh...