All I'm telling you to do is to be smart about it. Know that if this man isn't looking for a serious relationship, you're not going to change his mind just because you two are going on dates and being intimate. You could be the most perfect woman on the green earth—you're capable of interesting conversation, you cook a mean breakfast, you hand out backrubs like sandwiches, you're independent—but if he's not ready for a serious relationship, he's going to treat you like sports fish.
Buddhism is not a refuge from life. It is life stripped bare and known most intimately. Zen doesn't make you a "better person." It helps you become fully human. My mentor was no model for how to behave perfectly but for how to experience completely. He never told me how to live my life. He just helped me become alive.