Have you ever felt inexplicably connected to someone you barely know?

For context, I’ve known this person since the 6th grade. I’m 28 now. From the moment I saw him, I had a huge crush on him. We had mutual friends but never actually interacted much while we were in school. He dated like 3 of my friends (different friend groups). So I just assumed he didn’t like me and never told him how I felt. We only ever talked for like 2 weeks when we were 20. I told him I “used” to have a crush on him because I was scared he’d reject me and we agreed to be friends. And then I ghosted him… he had started flirting with me and I just got scared and ran. Months later, I apologized but he basically said “we’re good but we’re done.” Which is totally fair. I reached out a couple of times after that and he ignored me. Years later, I found out that during this time, he had gotten one of my old friends pregnant. Which is funny because we used to talk about how weird it was that our peers were having kids already. I don’t know what their relationship status is now. But even though we’ve both been in other relationships, it always goes back to him. He’s kind of my muse also. I’m a writer and I find that the story between us is an endless well of inspiration. I also have borderline personality disorder. And if you believe in astrology, apparently we have past lives together.

So TL;DR, have you ever felt an inexplicable connection to someone you barely know? Is it just mental illness? Or do you think it means something? And what the hell are you supposed to do about it?