Study Up.
Speaking of learning, brushing up on his religion before you go to his place of worship might make you feel more comfortable. “Homework always helps,” says Dr. Carle, “It shows that you care enough about him to invest some of your time into getting to know him better.”

Once you start reading, you’ll see that there are plenty of quick reference books on interfaith dating. That means you’re not the first girl to stress over the church invitation. Jennifer Block Martin, co-author of What to Do When You're Dating a Jew says, “[We] broke down all the Jewish holidays into crib sheets — what it is, when, how long it lasts, where (home or temple), why, other names for the holiday, level of importance, food, props, and what to bring.” If you pick up a handy book like this, you’ll save time and your sanity.

Dress to Impress.
 “The first time I went to Christmas Eve mass with my boyfriend’s [now husband’s] family, I ended up being totally over-dressed,” says Martin. But being a bit over-dressed is definitely better than showing skin. So, first try asking your man what you should wear. Then, since most guys never really know, just pick out the most conservative outfit in your closet.

Open your Mind.
Brooke K. of Los Angeles has had her fair share of interfaith relationships. “From experience,” she says, “I've decided that it's best to seek out a partner who has similar spiritual beliefs, so that there's no more Sunday confusion.”