Intermarriage

This is an issue I will have to face sometime in the future. My boyfriend and I are getting very serious and occasionally we'll talk about our future together (mostly being cute). However, I am from a Jewish family and he is from a Christian family. I asked him if he would convert to Judaism if we wanted to get married and he confessed that he isn't religious and doesn't see the point in converting. He said he had no problem with me raising any future children to be Jewish, but it does raise the question of how my children would identify as Jews. Would they consider themselves half-Jews? If I do marry this man, is he going to let me celebrate Jewish holidays with the children? Will he want to celebrate Christmas with them? Is he going to be uncomfortable if I wanted to circumcise any sons we may have? These are questions that are concerning me about this. Now, we aren't planning on getting married anytime soon. It's just a thought we both have. I'm also worried about my parents. Are they going to be okay with him not converting if he wants to marry me? Are my parents going to accept this? Also, his parents are devoted Christians. Are they going to be okay with me raising their grandchildren to be Jewish?