Does he have any interests in me? or is it just me assuming things...?

First and foremost, I’m sorry if I wrote too long.. because I want to see an accurate opinion as I don’t know how to judge them myself. Thank you in advance :)

There’s this guy whom I just recently notice. I didn’t know his existence at first, but one day I was walking behind him talking with my friend and this guy keeps on turning his head to the back and keeps on looking at me. I thought he was someone that I knew but nope I’ve never seen him before. Then I completely forgot about this incident due to spring break, and one day when the school starts again, I was talking to my ‘boss’ discussing about some lab stuff in his office (my boss is a grad student and that guy is also a grad student so their office are in the same room), this guy saw me and suddenly stood up from his desk and walked towards the desk beside where me and my boss were talking, and while he was approaching, I caught him looking at me once. I didn’t look at him but you know how we can still see what people were doing on the side without even looking at them.

Then a few days after that whenever I saw him, I always caught him looking at me whenever I went to my boss’s office, and also during the meeting and whenever I see him. But all this while I pretended that I didn’t know he was looking at me – and I guess he doesn’t know that I already know he was looking at me. But one day, he came over to our undergrad’s place to tidy up some stuff (told by his supervisor), and then I caught him looking at me while his supervisor was talking to him. This time our eyes met and I quickly look away. There were a couple of times this type of situation repeats, but I always look away after our eyes met. Because I’m too shy to look back. But a few days ago, I was talking to my friends and I heard someone walked pass, and you know how people automatically turn to see who is it when somebody walked by. And I saw him looking towards me, but he quickly look away when I turned my head towards him.

Therefore, I’m not sure if he has any interests in me or if it was just me that’s assuming things. Because nothing has ever happened between us, I don’t even know who he is, what his name is and I guess the same thing goes for him. It’s just that we are glancing at each other. I’m a really shy type of person so I don’t know what to do.