Try to focus on reading about Islam, so that you can decide what you want to do. Although, if I may ask, is there any possibility that he's not intending to marry you or something? I don't know I'm sorry; maybe you should discuss this with him. But generally he can't really marry an atheist. And pardon my rudeness but are you sure that he is serious? Sorry if that sounded harsh there's a feeling of unease I have I don't know how to point at it. I hope you deliver your son safely.