How do i tell a friend who thinks she is going to Bridesmaid that she isn't one?

I have a friend who I am good friends with who is pretty much convinced I am going to ask her to be a bridesmaid. However I did not choose her to be one of my bridesmaids. She recently asked if I had sent out bridesmaids gifts to let girls know they are a part of my wedding. I said I haven't told everyone yet, but didn't have the courage to tell her she isn't getting a gift. I know she will be upset, but I can't quite figure out the right thing to say without telling her that I just couldn't add her to the wedding party.