A girl, I’m seeing took a photo of me. We are not officially in relationship.

A girl I’m seeing lied to me and took a photo of me while I was sleeping. When I asked why she did it? “ I thought you’d do the same” was her response.

What’s the best way to let her know that I was really mad of what she did and make her understand that she can’t take me for guaranteed. If I was the one to take a the kinda of photos it would’ve been like a war..

I’m usually a nice guy, I would’ve never thought of doing what she did. Should I give her a second chance or walking away while it’s early is best? I’m confused and need some advice.