This is a difficult situation to be in. While you are an atheist, you still have some internal religious beliefs (Which is normal). Your best course of action to find a virgin woman is to find one in spiritual/religious community but you may have to be careful or you will be called a hypocrite. You'll have better chance finding a virgin woman who is younger then you, in the early 20s. Finding one close to your age is going to be extremely difficult.