Waiting till marriage!!

So lately my boyfriend and I have been talking about sex. I told him how I was uncomfortable doing it because I am a Christian and I'm waiting till marriage. He told me he understands and how he is a Christian as well but that he still wants it and will. I want to as well,but I want to keep my relationship with God strong. Please any advice would be wonderful! Btw we are both teenagers and he is two years older than I am...