Girls, What does it mean when she brings her best friend on the date?

So I met this girl out in public a couple years ago (at an airport, actually). She’s from another city about 2 hours away. We talked quite a bit and spoke about meeting up. I then visited her once in her home city and we went out for drinks together. She had a boyfriend at the time though and talking and having her liking my insta posts was difficult because I had feelings for her so I broke contact with her for about 8 months.

I recently got back in touch with her and was up front about why I had broke contact (because I had started developing feelings for her but she had a boyfriend). She responded, which she could have just ignored and we talked a bit the last few months. When I felt things had normalized a bit from my confession I suggested we meet up. She responded to it quickly and suggested we could get drinks and chat but then tried to change the date last minute to meeting for lunch instead (because of an appointment early the next morning). When I couldn’t we planned to meet up the next week and she said she’d be out clubbing with her best friend and we could meet up at the club.

At the club she was dressed really provocatively with a nice dress and lots of skin showing. I didn’t really have a chance to talk or catchup with her (because it was a loud music club) and was a bit weird because her other friend was there who I talked to a bit and introduced myself but the whole situation felt weird to me. I felt like a 3rd wheel so I went back to talk with other friends I had come with and then came back, said bye to her and left. Was her friend there because she was nervous? I just don’t get why she would have met with me on her own a year and half ago for drinks but now wants her friend there but is still dressing provocatively like she wants my attention (her friend was not dressed the same as her like it was a typical “girls night” out).

Can someone explain this? Is she interested in me? Why have her friend there?

Girls, What does it mean when she brings her best friend on the date?
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