Best friend seeing Boyfriends thing

Today my friend kept trying to go into my photos continuously after I’d asked her not to because I have private photos of my boyfriend in there.

She put her thumb print on my phone and I was just like meh. But I asked her. Don’t go into my photos.

And then she kept trying. And I’d snatch my phone off her and say no. My boyfriends in there please stop. Then she just went and did it anyway and now she’s seen my boyfriends penis. And she looked at me and said “I saw your boyfriends snack” and I don’t know why I’m so upset/pissed off.