Is this sign that a girl is nervous around me?

There is a girl I work with who does not look at me or say hello/good morning/good afternoon to me, but does so with everyone else. When walking towards me she will look straight ahead and avoid eye contact.

Recently, we were in the canteen together at the food counter. We would not look at each other or say hello to each other/talk to each other. She would look straight ahead. However, whilst being near me and looking straight ahead, she began clicking her tongue.

Is this a sign of anxiety and nervousness around me?

Additional information: she has previously shown signs of interest, such as holding eye contact to get my attention, initiating a conversation and complimenting how I looked. In addition, her friends were vetting me by asking me whether I see multiple women and have affairs.

Is this sign that a girl is nervous around me?
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