It is wrong for me to distant myself from this guy coworker?

Lately he became a little “friendly” towards me not that he said anything inappropriate or anything like that but I might be overthinking I just don’t want this kinda attention especially knowing he is married, so I started slowly distancing myself from him he will still find a way to approach me to say hi if not small talk am I wrong for this? He really is a nice guy but like I said I don’t need this kinda attention anyone with me?

It is wrong for me to distant myself from this guy coworker?
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