okk...umm....Why don't you just give his religion (Islam) a try? I mean its probably a big thing to do...but just cuz your getting married, doesn't mean u gotta stay christian and he's gotta stay muslim. Islam is a great religion to be part of and I'm real proud to be Muslim. That way, you won't feel left out or anything, and I'm really sure you'll like being muslim. Your probably thinking " I don't wanna cover my hair" or " I don't wanna wear abaya" or stuff like that. First of all, go with the main idea of believing in God if you don't believe in that and go through each step to be a better muslim. Just give it a try. Hey, you never know...

“The rise of Islam offers perhaps the most impressive example in world history of the power of words to alter human behavior in sudden, surprising ways.”
William H. McNeill quotes