Make eye contact with boys in library...

So umm...22F preparing for banking exams.. i go to library at morning and comes home at 7pm somthing.... So i often find myself with making eye contact with random boys and also girls(but for girls they don't care much but for boys i think they are getting wrong idea).....i mean I am also amazed by this habit of mine like I don't know what to do about it...I am Very serious regarding my studies...I am not looking for any relationship...but i think they are getting wrong idea that ,I am willing to talk to them but it's not like that ..... And also I have made eye contact with one boy thrice or something randomly 🙂...now it is very awkward...(And they all are very popular guys in my library they always stand at entrance...not much serious about studies....so you will get idea about my situation) I know it's not serious issue but please tell how to ignore these things... I was always a shy girl with not much male interaction so maybe thats why I am feeling very awkward about it....