What is the ruling on shaking hands with female friends and kissing them?
It is not permissible for a Muslim to shake hands with marriageable females or to be alone with them. He must not kiss her because this is the gate leading to adultery which is one of the gravest major sins. Allah has forbidden all these means which lead to adultery such as the forbidden look, being alone with strange women, and kissing them is of course even worse. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.