If he or she don't want to serve God, but you do; do it! Don't let no one separate you from Jesus! Sometimes through their playing church they lead you to Jesus, but the difference is you chose to serve Him for real. It may cause problems, but you stand on the Word of God. Don't let no one cause you to land in hell. Be about the Father's business, if you love Him you'll serve Him with honesty and truth. Any other way is living in vain!