How should I act when women at my work place give me strong eye contact?

Sometimes stand or sit too close to me to discuss something, stare me up and down at times, compliment me for being intelligent etc?
I'd like to add that I am a confident introvert but I only am social with close friends and very few co-workers.
If it helps to form an answer and I am not seeking validation, but I have natural tan skin, confident body language, my physique is lean muscular. I am not sure how much this plays a role. I would appreciate your precious insight on this topic.
I am unsure should I ignore these things that I notice on a daily basis or what should I do?
Sometimes I plan to ask a co worker out but then I change mind as I do not want to be in work gossips which might affect my career.
How should I act when women at my work place give me strong eye contact?
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