Mirroring for attention

Does HPD make you mirror people who receive attention? I'll tell my story and give a few examples.

I suspect this girl I know has HPD, but I haven't known her long enough or see her often to know for sure. She tends to parrot the things I say because I'm generally very blunt and comedic in my style of speech and like to make people laugh, which gets me a lot of attention. I'm also an avid reader and am highly opinionated. I noticed she would eavesdrop on conversations I had with other people, especially men and I felt like she was trying to hear what we spoke about so that she could do the same and receive the same attention. She wouldn't grasp the actual depth of the conversation, she only paid attention to fact that they were speaking to me and not her. Next thing I know she was suddenly interested in the books I was reading and asking me their name, even though she had absolutely no understanding of the depth or context of said books.

She is also particularly sensitive about this one guy, who I believe is a NPD. I hadn't seen them since I'd moved across the country so I had no idea what I was getting myself into when I returned. When I went back to visit my hometown, I got stuck in the middle of his games. He idealised me, put me on some pedestal, to make her jealous. But she's entirely focused on beauty and believed that the reason me and him bonded was because of my looks, unaware that he was using me as a means of getting to her. I once got on the back of a bike with him and he was totally reckless. I got off, filled with excitement and fear, our friends there started hugging me and making sure I was okay. Next thing I know, she got on the back of the bike with him and when she got off she came to me saying she was terrified - but she didn't seem scared at all, in fact she seemed pretty emotionless about the whole thing.

She got excited when I'd say my natural hair was like hers or if someone mentioned that we resembled each other in any sense. The night before I left I hugged her tight and told her to take of herself, that she is smart and beautiful and can reach her goals. She started crying and said "Not as beautiful as you.", completely disregarding the part about being smart and reaching her goals, making it obvious where her insecurities lie and why she believed him and me got along so well. Next thing I know she is covering herself in bronzer and cutting her hair short like mine.

What I'm wondering is if this is symptoms of HPD or if their is something else at work here?