Why would he be super flirty but then just stare at me?

A few months back a guy I see around seemed to show some interest in me. He’s really funny and I would smile and laugh at him, and he would grin at me, when he saw me smiling and flirt a little but then he just started to ignore me.

Then the other day when I saw him walking towards me, I was in a really good mood so I gave him a big, warm smile and looked away and he just sort of coughed and frowned as he passed me. Five minutes later, I run into him again, but this time he’s looking right at me, locking eyes with me, staring quite intensely with this cheeky, sexy smile. He’s super cute so I’m grinning from ear to ear and holding his gaze for as long as I can, and we say Hi as we pass.

Over a week goes by and then I see him again, but this time he’s staring at me from a distance with a confused kind of frown and he walks away. To be fair he is at work, so obviously he has other priorities, other than to flirt with me which I do appreciate.

But he did seem to be interested and I’m not sure if he was just having fun because I seemed into him? Or if there’s something I can do to get his attention without seeming too desperate?

Why would he be super flirty but then just stare at me?
Post Opinion