<human>: Can you provide a brief overview of the text?

This happened about 20 minutes ago. I've been talking to this girl for awhile and we've hung out a few times already and everything has been going pretty well overall. She's out of town at a water park with her best friend so her snapchat story has been full of updates. Here's the fuck up. I'm still relatively new to the smartphone game (only had one about a month) and she sent me a selfie with her smiling and in a bikini. my reation was "hot damn..." and I thought nothing of it when I screenshot it. Apparently that lets the other person know but the real fuckup is it wasn't a personal message but rather posted to her story as well. Apparently what i did is a no-no in snapchat etiquette so now here I am hoping I didn't screw up my chances waiting for her to reply after she sent me a text saying, "Did you screenie my bikini photo?"... I need a bro, reddit.
<bot>: my friend posted a titillating photo which I thought was for me, turns out I might be a creeper for saving it.