What should I do with my best friend

Me 27f and my best friend 27f, we have been together since 7-8 years and we both live in Canada but basically from India. I consider her as my best friend and I think I am hers too. Since many months she is acting different, she doesn’t picks up my calls or doesn’t texts me as we used to do. Once in a while she updates me on something big. I know she is busy in her life and may be going through something but I think she takes me for granted. One day I went to her home to stay and she had her work colleagues cum friend there and she introduced me as just friend not best friend she was very nice to them which she is never to me. Should I give up on the friendship?? I tried to ask and did everything in my power but i kinda feel distant from her.