Advice please :)

Hiya so basically ive got this friend whos really difficult to deal with. shes lovely and we have great chats and all but shes got some health problems and shes also queer which isnt a problem however she makes those her entire personality. my family and i are christian (im an ally however my family not sadly) and she wont shut up about it even in my house and im so scared of them finding out bc theyll make me block her. im hosting a meetup with a couple friends and i invited her because we’re friends but now im getting a bad feeling about it and want to uninvite her but i dont know how to without saying "it’s because youre queer and your health" because thats not the problem its just she wont stop talking about it