I face this problem sometimes. Just pray that God will guide you. You never know, he may set up the perfect opportunity for you. You can justfind courage and ask. Try not to like tackle the person with it or anything, but just sort of slip it into casual conversation. Talk about how you enjoy church, and just see if they want to come along one sunday. If they say no, don't pressure it. Just pray for them and try again after a couple of weeks. Good luck.