My boyfriend wants to finger me, what if it gets out of control?

I went to my boyfriend's house yesterday and we mainly hung out in his room... It was a bit odd at first but then we both relaxed and I was snuggling with him and it was really nice and we were like that pretty much the whole time then he was like I have a creepy question for you.. I was like ask it.. Thinking how bad could it be? Well he asked me if he knew what fingering was and I said yea and then he asked me another quesiton.. Only more personal.. He said.. " do you play with yourself?Did u ever fingered in private?" I was like... I am not gonna answer that... Then I admitted it and said yea.. Then he asked " do you want me to finger you?" I was like no... He kept asking why not why not? I said I just don't want to.. Can we please quit talking about this? I feel like you are pressuring me into something you don't want to do. He said no I am not and I said yes you r... Then we dropped it... What if he asks me again? He is 22 years old and I am 21... I would let him even i want to relax with his hands but what if things get out of hand? I am staying abstinent until marriage and that is final... I kinda want to let him but I do not want to take the risk of not being able to control myself. As well as him too... Cause him kissing me turns me on a lot... So what would letting him finger me do? I don't know what to do!! He seems to love me and I said I did not want to and he did not get angry so I do not think he would break up with me or anything... I mean it is just fingering... But again I do not want things to get out of control...Also i dont want to loose him....