Even though you may believe in premarital sex for yourself, certainly you would respect a woman that doesn't. Make sure you let her know that you would be respectful of her beliefs and it's not a deal breaker for you. You might be surprised at the beautiful woman God has waiting for you:) Read the Book of Tobit in the Catholic Bible, it is truly inspirational on this topic.
I think Laura said it very well. In addition, the admonition against premartital sex is plainly stated in 1 Thessalonians 4:3-8 and Galatians 5:16-25. So, it's not the priests or the Church, it is truly God who gives us this caution.
Personally, I am willing to give the benefit of the doubt to a person who doesn't agree with #7 because it just may be that he will respect my beliefs & standards in this regard.
However, I will generally pass over a profile of someone who does not put God at the center of his life & that includes attending Mass less than weekly.
As others have suggested, DO NOT LIE about who you are & what you believe & practice.
And I do agree with the advice to be patient because sometimes it takes time to get even one solid response from someone you might connect with.