Cuddling with my guy best friend?

We're friends for half a year now, I'm 17 and he's 18.
We were pretty close from the beginning, and we talk about everything. First we only cuddled when watching a movie, but it happens more regularly now.
He has a girlfriend (long-distance relationship) and she knows that we cuddle sometimes, and he says she's okay with it.

He also tickles me sometimes, holds my hand or plays with it, strokes my back, ...

But we both don't want more than friendship.

So is it normal for a guy with a girlfriend to cuddle a female friend for a really long time, even without watching a movie?

Because everyone in school thinks we're together, even though we keep telling them we're not. And it just made me think...
Cuddling with my guy best friend?
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