Why Did I Send That Text?

So here's my dilemma, and I'm hoping you all can help me understand why this happened. You see, I was at a friend’s place last weekend when we started talking about old high school crushes. It got us reminiscing, and before I knew it, I was sharing a story from way back in middle school. There was this one guy who used to sit behind me, let's call him Mark, he always seemed like the cool kid but never paid much attention to anyone else. Anyway, during our high school reunion chat, I got nostalgic and started thinking about how we all turned out differently since then. Suddenly, a memory popped into my head: one time in eighth grade, I sent Mark a note telling him that his new backpack was so cool I wished mine looked like it too. But here’s the weird part, after talking about old crushes last weekend, I had this intense urge to reach out to him on social media and tell him something similar. Now you might be wondering why this is such a big deal right now, all these years later. Well, for starters, I haven’t talked to Mark since high school graduation day. Plus, we were never really close friends, just classmates who rarely exchanged more than passing words in the hallways. Yet here I was, about to send a message that felt like it would make us sound overly friendly and maybe even slightly weird. I wrote the text on my phone, drafted it multiple times, erased everything over and over again until I finally hit send with sweaty palms. It read something along the lines of ‘Hey Mark! Long time no talk. Remember when I said your backpack looked awesome? Mine’s nowhere near as cool.’ Immediately after sending it, I panicked and thought about how out-of-the-blue it must have come across. Did it seem like a weird way to reach out after all these years just to say something silly from childhood? It's not that I’m looking for him or anything; it was more the urge of wanting to connect on some level again but in such an odd fashion. So, what do you think? Is there any reason why this sudden connection to send a message like this after all these years is normal? Or am I overthinking way too much?