Answer:
You can't per Islam religion. It is not allowed for a Muslim man to date any woman (Muslim or non Muslim) without marriage according to Islamic rules. In Islam, any form of sex (oral sex or intercourse sex) is not allowed without marriage per religion.
You have free will to chose the religion that you believe in or to chose to convert from one religion to another or to chose to be of non religion. However, choice is responsibility. The consequences that get and face depends on the choice that you make. If you chose to be follower of any religion (Islam or any religion) you must adhere to this religion preachings. Otherwise, chose to be non religious and be responsible of your choice.