I’m Confused...

So there’s a guy at my work that I’m interested in (I feel like he’s interested in me as well, but as the title suggests: I’M CONFUSED). We’re already pretty good friends, but I’ve noticed lately that we spend more time together and talk a lot more. When we’re at work, he’s always walking up to me with a huge smile on his face and theres some days where I feel like he makes stuff up or finds excuses to come talk to me, he always tries to be near me (taking breaks around the same time as me, sitting next to me at meetings, etc.), and he also really talks himself up like he’ll tell me about his family and his career goals and what he does for fun outside of work and all that. He once asked me to hangout with him sometime but we never talked about it further or planned anything. That part that confuses me is that he doesn’t talk to me OUTSIDE of work. He follows me on Insta and Snapchat so there’s 2 possible doors for him to open, conversation wise and he doesn’t message me. In my mind, I feel like he would pursue me in and out of work if he was truly interested, but I’m not sure. I’ve read magazine articles on the matter, asked trusted friends who are dating or married, and tried remembering how my exes acted when we were “crushing” on each other and they all say or imply different things. I’M SO CONFUSED!!!!!😬