No one is obligated to be friends with anyone else. It’s only understandable that we are all selective who we are friends with and we have rights to apply whatever criteria we see fit. It’s nothing to do with judgement but rather with rights to choose who we associate with. You don’t owe this person anything. Nothing to feel bad about. She isn’t a family member or life long trusted friend. People meet, find themselves incompatible and move on. Politely wish her the best and cut the ties.