If 17.5 years girl call 17 year old boy in her home in absence of her parents in year 2015.She kisse

If 17.5 years girl call 17 year old boy in her home in absence of her parents in year 2015.She kissed boy .They never had sex.Gf don't want to marry.She broke up.Now after 6 years her present bf asked that boy "whether you were physical during minor.The boy thought kissing is also physical.So he replied yes.Her present bf want to file rape case against that boy on the basis of that text message that he admitted physical relationship when they were minor..But in reality boy never had sex.