Manager and crew romantic relationship? Is it possible?

Hey guys! So I’m 19 and i work at McDonald’s. There’s a shift manager that I think is extremely cute, he’s 23, and I don’t know if it was possible for a manager to have a relationship with a crew worker. I don’t know if he likes me or anything but just some things kinda come off as weird when he’s around me and he’s kinda shit around girls from what I hear. He fidgets a lot around me, doesn’t really talk to me, is very short sometimes when he talk, but other days it’s a whole different thing and he’s always attentive to me and what not. There’s never any kind of behavior change when it comes to any of the other crew workers and trust me I notice the difference. Even if we aren’t able to date, could it be possible if he dated in secret? It were just seeing each other on our own time without anyone knowing? I’m really stuck in a rut here so I need advice.