I’m a creep

I really want to apologise to this girl but she I can’t because she doesn’t know, we were swimming and her top was riding down and for the whole swimming session I was trying to get it to go further down, I also didn’t tell her and only did when it was all the way down, I feel like such an awful person and I feel like I tricked her and objectified her and I don’t know what to do now because I haven’t stopped thinking about how I’m such a creep for doing that to her.