Ever had a connection with someone but not entirely sure what it is?

i have a very strong connection with this girl but i'm not entirely sure what it is , we get along really well but we've never like dated although been some strong attraction.

other girls didn't really seem to understand me but she seemed to understand me and know what to do to make me happy.

but not entirely sure what our connection is , perhaps is some chemistry going on but seems to be something else
Ever had a connection with someone but not entirely sure what it is?
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