My crush from high school just randomly messaged me...

lo
Last night like at 12 AM. We stopped talking last year. But he still remembers one of my favorite songs and said he thought of me when he heard it! 😱😭. It's the song we used to listen to together all the time. I was totally into this guy but nothing ever happened between us.
It has been 4 years since h.s. and I don't feel the same way as I did before but I'm like totally being a high schooler right now. 😩 music was one of the main ways we bonded.
WHY right now? 😭 what does this mean? Probably nothing... Haha! Gah. I hate this. 
Has this ever happened to any of you? Like getting a blast from the past from a former crush or something?? Sorry for this sappy post. Lol