Relationships advice please

Hey! Ok so I have some tea that i need womanhood advice on please help if you can thanks! There is a lot I am going to say just saying so yeah.

Ok so here is the tea:

-So The guy That I like.... well we both work together but he is the sub director which is basically just a manager. We also found out we both go to the same gym (which is next to where we both work)bc we saw each other there. At first (well at first after the fact that we saw each other at the gym) It would seem like he likes me bc he would always talk me up by saying things like “enjoy ur break” or “so did you get to eat on ur break?” Or even told me a lot about the gym. Pretty much he would tell me things that he wouldnt normally say to anyone not even me im sure too not even before he saw me personally in the gym im sure. He would even always say hi and try to get glimpses of me now matter where I go. I see it from the side of my eye and when I am by myself at where we work he would try to glimpses of me. And he even once smiled and saidhi when I went into work and also purposedly checked me out and made sure i was looking when I came into work. BUT now things seemed to have change.

When he comes into work he now would seem mad and doesnt say hi to me nor anyone. He still tries to get glimpses of me and tried to help me once but he rarely talks to me now and he even now just stares at me pist when afar. He occassionally says hi if he sees me directly but idk.

However There was even this incident where I saw him walking out of the gym and i was walking past him after when I was done with work and he said “hi” and smiled and asked if “I was done over at work” i answered and said”yeah but it was super hot at work since the system is done with the ac.” He just smiled and kept walking But the whole entire time he just kept walking past me whilst we were talking like gurl what?! Lool like...? Ok?

What do ya’lls think I should do? I definitely dont want to miss out on this person at least just a date. All I want to do is hug him but gurl like give me advice pointers.

Idk if he still likes me ? Ik i should ask him but i dont want to be hurt so bad and idk when where and not even how to ask him if he likes me and wants to date especially because i dont want to fuck up our jobs yenno?

So help what do I do?? What should I say? How and when??

Please dont hate ik it may sound stupid but honestly no need for your hate if nothing nice just dont say anything thanks!