Eye contact what does it mean to guys?

there's this guy friend of mine who flirts with me a little and we also share some interests.

However, his eye contact make me go crazy.. we would be in a huge place with a few people and almost every minute he would look at me and i would catch him looking then we stare and then he smiles in a sexy way. Other times we would do faces at each other and laugh quietly so no other people would notice what we have been doing.

it's so intimidating, but i want to know what to do guys think about if they do that? does it mean something in particular?
Eye contact what does it mean to guys?
Add Opinion