A girl issue advice for how to go about it?

I made friends at the swimming team recently I told her I view her as a friend. She keeps like I guess sexually harassing and a little bit of other things. She just sent a personal photo of herself to me not even 5 minutes ago how would I get this through to her without blocking her or upsetting her that I do not wish her this because it seems like she's not listening let alone with her grabbing my cheek a few days ago she's going to get herself in trouble and I'm trying to prevent that. I really hope people can actually help me out here if anything this before she gets herself expelled or suspended. Halp pls đź’€
A girl issue advice for how to go about it?
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