Super confused...

So I’ve known this guy since we were 4 years old and we’ve been going to school together ever since. Recently I found out that a few years ago he used to like me, but I’m not sure if he does anymore. A few weeks ago I noticed that he was acting weird around me, he’s usually kinda rude to people and never talks to me (we don’t have any classes together) but lately he’s been taking to me and remembering these tiny details about me from years ago. Me and my best friend just got his Snapchat and his number and He and I texted each other a little bit. The other day as he walked passed me he stared directly into my eyes and smiled for what felt like forever. It was sooooo awkward. So I told some of my closest friends and they keeps saying that they think he likes me but I’m not sure.