I agree with Aggie , why bother in being polite. She is no friend she is a user and , sorry , but I’d be blunt and tell her that to her face ...please or offend , she is not worth bothering with .
I had met what I thought was a nice friend a year ago , only to recently find that she has now made a new friend , which I’m fine with that , but, as I can’t walk very far because of disabilities and she can walk for miles , this new friend can walk for miles same as her , so when we had arranged to meet up last week as we usually do ( outside , covid rules apply ) , she introduced me to the ‘ new ‘ friend , then 20 mins later left me to go off walking with her new friend with hardly a backward glance . So much for her being a ‘ friend ‘ .