Confused by girl, she won't give me eye contact?

Ok there this girl I work with I have in past asked questions on here about her to which I got a lot of answers saying that she is interested. But what I don't get she won't give me eye contact. When I go into work and when going, she will say bye but she won't look at me, but she will look at other guy?

Confused by girl, she won't give me eye contact?
Post Opinion