Im confused

OK, so pretty much there’s this dude who I was sort of friends with we didn’t never really talk. He would just show up at my job and order food sometimes but I know that like he had a little bit of a crush on me at one point, I don’t know the extent because we never really gotten into like a talking stage. We had like one or two conversations on messenger and that was it and then sometimes he compliment me whenever he’d show up at my job, but that’s it and then I just recently saw like a while after I had moved from that place that he had randomly unfriended me on Facebookbut he has almost like 500 friends and unfriending someone on Facebook is so specific and concern so I’m just wondering why he would do this because I can’t recall me ever being rude or anything to him