Most Helpful Guy
Sounds like you two are in a relationship. I would have that talk before you attend church so you both are 100% on the same page
Most Helpful Girl
If he has given You his Honest John Answer in Calling him 'A boyfriend,' so be it here, dear.
However, if you do Not feel the zeal and the Need to Call him This because you are Not 'Comfortable,' tell him for now so you don't have to Explain Any Sweet Tweet to Every Godly person, you would prefer to call Him... My friend_
Good luck. xx