Why do some people try to outshine you/ are in a one sided competition with you?

Like some people picking up your hobby, dress style, mannerisms etc. after getting to know you. In my case it’s always women who would keep taking glances at me and for instance start wearing dresses, skirts or push up bras with tight tops at work for even though they tend to dress tomboyish or just not very feminine at all. Oftentimes those women already have boyfriends and don’t have to compete with me for work opportunities or male attention since they are more socially adept, objectively prettier and more advanced in their careers. So why would they feel the need to imitate me if they are already years ahead of me just as they are?

Why do some people try to outshine you/ are in a one sided competition with you?
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