Why would a girl do this?

Anonymous
A girl basically tried to ruin my relationship recently. I told her to stop liking his pics and she never replied to my message. I told her to leave him alone and she never texted back. 6 months later i rang her by accident and she starts insulting me. She tells me she went to a hotel with my boyfriend and when I looked up the hotel she said she went too i found that the hotel only opened 4 months after she claimed to be there so basically the hotel did not exist. First she told me she went to a hotel in January with him and when I texted her a month later, she says January again and then a month later i texted her to tell her to stop and she changed her story and she said that she went to a hotel with him every week. Why would she lie and be so evil? I confronted het and told her that the hotel did not even exist when she claimed to be there and about changing her story and she went crazy and called me loads of names. Whats her deal?
Why would a girl do this?
5 Opinion