Is it possible to completely erase someone from your mind?

I have a problem and I've looked into a solution or some other case like mine in two different languages and I still haven't found anything useful so I decided to come to this forum here for some insight.

Okay, so here's the story: I have this childhood friend. We've known each other since we were born and we were really close at age 12/13 but then my parents divorced and I had to move to another state and we completely lost contact after some time. Two years after that I came back and started going to my new best friend's church and there I met him again but it was like we had never been close to start with and yet after a while we begun talking and meeting up thanks to having the same circle of friends and we exchanged contact info.

Long story short, I fell in love with him. (I know this must sound like I'm bragging or trying to make this seem like a romance novel but this is important for the story, trust me) Everything seemed okay, he gave me all the signs he liked me too but as I became confident enough to confess to him he started growing distant and we had a fight and stopped talking/texting altogether. Okay, so here's the weird part.

Meanwhile, I was on Facebook looking at our old conversations and accidentally scrolled up to older messages. And there were a lot (like, really, I had to run an algorithm and still couldn't reach the top). Most of them from really long ago, 2012/2013. And as I started reading them, I started remembering all the events we were talking about but I grew confused cause I didn't remember him being there at all.

For example, we talked about a movie night I had with girls from my middle school and I remember that day like it was yesterday. I remember the room full of us, I remember the girls' faces, the movie, the things we did that day but according to my facebook history, we talked before and after I went there and I don't remember that at all. In fact, I don't remember him being anywhere in my memories at all.

According to my mom, we used to play a lot when we were kids and I remember none of those moments. I also have pictures of him being there in every single birthday party of mine and yet when I remember those days, I can picture everything but his presence. That's not a surprise per say cause I've been having memory problems since my mom and my dad divorced but I had never figured out the source of my "amnesia". And as I was thinking about it, I realized he might be the problem itself cause I completely erased him from my mind. The only things I remember about him are the ones that happened recently.

My friend told me he thinks it might be because I fell in love with him and he couldn't respond to my feelings. I have clear evidence of this in the conversations (the fact that I chose not to tell my friend he liked her despite him asking me about it everyday) I found but could this be? Did I make my mind erase everything about him cause I couldn't get over my disappointment? Or was it something else? I just don't think it's a coincidence.

Anyway, that's my doubt. What do you guys think is happening? Also I know it's not a case of "locked memories" cause they should have been triggered once I fell in love with him and got rejected (again?). So if you're a psychologist or a student or someone who knows my "condition" please give me an insight cause I don't know what's happening and I really wanna figure it out! Thank you!