does he like me or not ( shy guys opinion)?

I've just started a job and its been 4 months but there's this guy he's a chef. we work in different parts in the carehome cuz im a cleaner. Anyway whenever he walks by I've seen him lookin at me and I think he caught me lookin at him. When we were on our work break I was with the other girls he came out on his own but paused commin towards us as if he wasnt expecting to c me cuz when he ws sitting on the grass I caught him staring at me a few times before I went. Then all of a suden today he said hi for the first time, but 3 weeks earlier when I was putting the rubbish out I got a fright cuz he was justing there and said is she giving u a hard time ( the cleaner) I said no then he laughed. But he didnt go back inside until I left cuz we go through different doors. But I still catch him looking at mr each time he walks past but whenever we are in the lift he justs looks doon at the floor. Is there any other signs or signals to look out for so I know if he likes ne or not. He's quite and shy. Whats ur opinion? Oh and could u give me some other signs and signals ortips so I know if he likes me or not. And fyi he does not have my number n I dont have his.