I remember long ago (and not far away) teaching PE my first year. 3rd-7th. I had a 3rd grade girl that must have had a crush on me. It was no big deal. Over the 40 yrs I taught PE some kids want to be close to you and some dont. Some want hugs and others do not. I never worried much about personal space with Elem. kids. It was human and natural to have them run up to hug or hold my hand (usually kindergarten). I was called dad so many times I lost count. High school would be much different but many times I would go up to middle school and many of the same kids would run to me for hug or chat.