to be different religions in love

Okay so my boyfriend and I have been together for 15 months. We've known each other for 2 years. He is my best friend, my baby, etc. he feels the same about me I know for sure. I love him and we always talk about how we will get married, have kids, etc. he's Muslim and I am Christian. He has met my family, although at first he did not want to because he was sure they'd be upset about me not being with a Christian man (my family loves him and they don't mind that he's Muslim, as long as he's not trying to make me convert against my own will.) And we all respect his religion tremendously. For Thanksgiving my Aunt made absolutely no pork because she knew he was coming over and she wanted him to eat everything he could! Lol. His cousins,uncle, and brother know about me but other than that I am a secret to his parents. He is not allowed to date because of his religion. We'll be 20 in 2017. We are in college and we practically live together (he stays over everyday.) I just want to know, will this work? I mean. I know it can work because of love and our religion doesn't affect our relationship, but is there any Muslim people or Christian people who have dealt with this and can give me tips? I just would like to know what I should do. My parents have asked several times if his mom and dad knows yet and I always say no, but they will eventually. I respect him not telling them, but it does suck sometimes. So any tips, eve?