it wasn' cheating when she touched your arm, or when you went back to her place, or when she took off her shirt. what came next was cheating
it doesn't count if it slips
well, she was mostly not-naked
girlfriend "slips" in the gym showers
its not cheating babe
gf gives not a blowjob
wasnt naked so not cheating
his cock never went inside me. so not cheating