Thousand Miles:

Lying isn't cool. Demanding the answer to extremely personal questions, especially in a new relationship, isn't cool either. He didn't have the right to pry into your personal life so soon. You didn't destroy anything by withholding information that he wasn't entitled to know. You did not "poison" the relationship or sin against your very own sweet nature by fibbing.

You didn't do anything any other kind hearted individual would not do. You are not to blame.
Everyone else here is trying to explain this to you --- get it in your head!!!

This isn't your fault.
This isn't your fault.
This isn't your fault.
You are not to blame.
You are not to blame.