I am an atheist and have been for a long time and my girlfriend of 3 and a half years is a christian. She says that if I can't convert then we are done. I really love this girl though. We've talked marriage, kids, our future, everything. She knows I don't mind her being christian or raising our kids that way, but she says she can't be with me unless I convert, but as any atheist knows it's not really a decision. What can I do? Any help is greatly appreciated.