Is it obligatory to boycott a well-behaved friend who has intellectual ambiguities, such as denying some authentic hadiths, being influenced by feminism, and questioning the trial of the Antichrist, or should one continue to advise and remind her?

You have done well in your concern for your friend and her religion, and in your reconsideration of the impact of her companionship on your own faith. A balance must be struck between the necessity of giving advice and the danger of relationships with ideological differences. Abandonment is a cure if it benefits; otherwise, a believer should not abandon. The criterion for a relationship consists of three pillars: the friend's eagerness for the truth, her respect for differences, and your reassurance in what you are upon. If these pillars are present, then the aspect of companionship is generally better, along with offering her advice, gentleness, and good character. If the conditions are not met or your soul becomes disturbed, then separation is better.