Non-ual relationship?

am a 22 year old woman and i ve been seeng a 26year old man for 2 years now. since we started dating, we have neva made love. am still a virgin and dont feel too ready for . just last week he was telling me how much he wants to make love to me. am not sure if i shud give in or not. am not ready fro it. how do i explain to him am not ready and make him undestand, am kiping myself for marraige. how do i make sure he doent ask from some else to sleep with him.