PLEASE HELPPPPPPP?

So on Sunday we were meeting up with a guy that my best friend was talking to and while me and her got ice cream that guy was taking a picture of our behinds (like back and our buts) like he was taking a picture of my best friend and her stuff and then I was in the background (and my butt was also) and she had found that out on his phone and deleted it? What should we do? I had a good time until I learned of what he did today, me and him were laughing always and also he seemed very protective of me like touching my lower back and pulling me to one side by my elbow and walking very close to me which I didn’t mind and would always look at me while talking to her, and then asked me for my phone number which I didn’t mind, but while he made her very uncomfortable like making him sit on her lap and he tickled her inappropriately, what should we do? Please help
PLEASE HELPPPPPPP?
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