Roleplaying is like playing out a fantasy u and ur bf may have, for example wearing a cop uniform and pretending to be a criminal and he arrests u and bonks u in the police station interrogation room, or pretending to dress up as an innocent school girl and become a naughty schoolgirl,
It all depends what he wants to roleplay do u know what he wants to roleplay
P.S i am male not female so if u dont feel comfatable tell me

But i am willing to help you.