Why does my personality change when I start dating?

I noticed that when I'm single & not dating anyone I'm one persob but then when I start dating my personality changes. When I'm single I enjoy walking a path of spirituality & studying enlightenment, Taoism & Buddhism but when I start to date someone another side of me comes out. My creative side comes out, my love for dark photography, ethereal dark music, wanting to visit dark forests with my date & my love for dark aesthetic resurfaces. I have shared my love for enlightenment with my date but my "dark side" wakes up natrually. I'm not sure why. Does this happen to anyone else? Could this have anything to do with Yin & Yang energy? This kind of makes me worried bc I'm not sure why it happens but I would like to know the root of why this happens. It doesn't bother me but at the same time, why does this side of me come out when I'm meeting someone new that I like or have romantic feelings for?
Why does my personality change when I start dating?
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