Is he being professional / friendly or is he interested in me ?

Hi,
I have meet a guy at work recently and I kind of like him. (Mainly because he has been very nice and helpful to me since the first day of work)

I feel like he might be interested in me as well, as I always see him look at me from the corner of his eyes when I pass by in the hallway. If he notices me looking at him, sometimes he will immediately look away. And he always finds “reasons “ to talk to me , like come to my work position and ask if i am doing ok, do you want some snacks , helping me out a lot even I didn’t ask for any help and we don’t even work at the same position, taught me the important things i have to know when working in that company after work on the first day. Also , I notices him talks to me in a softer voice ( and he usually talks in a more socially aggressive + louder voice with the others )

However, there was a time that he bumped into me by accident, and he said “Sorry Buddy.” Does that mean I am being friend zoned by him?

However my friends said he is just being professional, and it doesn’t mean he is interested, which makes sense to me as well. ( like if my cousins work in that company , I will always go to their work position and check if they are doing ok . And in my past working/ volunteering experience , my employers/ volunteer coordinator would ask if I am doing ok after work)

But I don't know that guy in the past , and that guy is not my employer . Besides, there are several other new comers, and i didn't see him helping them that often. (But there is a possibility that i didn't see him helping them ) Also , I don't think a person will look at you from corner of his/her eyes if he / she is not interested .

So , what do you think? Do you think he is just being friendly ? Or is he doing this because he is interested in me ?
Thank you !