Do you think this was very nasty?

A girl on social media basically bullied me and tried to split me and my boyfriend up. I texted her in the first place to tell her to stop liking my boyfriends pictures. She claimed she was his girlfriend but when I asked her for proof she never sent anything and I asked her over and over for proof and evidence she was with him and she never sent anything and I told her to leave him alone and I sent her a photo of me and him together and she still never sent anything to show me she was with him and i texted her and told her to leave me him alone and she never texted back. She just seen the message. I told my boyfriend about it and he said that she was crazy. A few months later she started texting me and telling me that she went too a hotel with him once in January in the city. I asked a few questions and she blocked me. 2 months later she changed her story and said that she went to a hotel every week with him in December and she said that she stayed in a b&b in the suburbs. When I looked the b&b up I discovered that the b&b only opened 5 months after she claimed to be there with him. I texted her and told her that she was lying as the hotel was not even open when she claimed to be there and that she changed her story to one time in January to every week a few months later. I also questioned her as to why she didn't tell me anything in the first place and She went absolutely ballistic and started calling me every name under the sun and told me she would get the police to track me down and then blocked me. Why do you think she would lie about all of this?
Do you think this was very nasty?
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