Do any of you make too much eye contact, how do I get it right?

I've always made too much eye contact, in school my nickname was beady-eye, or in my first job I freaked everyone out with too much eye contact which contributed to my losing my job.

Currently I'm worried I'm making too much eye contact with a man are work - I am attracted to him, and he has icey blue eyes that are very striking. But in my defence I don't stare, and eye contact is most likely to be when I walk in the room as his desk is opposite the door. Maybe I'm just being anxious and paranoid, maybe he's staring at me too, or maybe I'm now the office creep.

I have no idea how I'm supposed to know what is normal eye contact.