Christian ladies, lets talk losing virginity

I lost my virginity to my boyfriend a couple months ago, and I honestly never regretted or felt bad about it. I can't decide if this makes me a christian or not. I don't see why purity is such a big deal and sex before marriage is made out to be wrong. If it's not hurting or effecting others, what is the issue? None of my friends that I go to church with (young adults) are virgins, because they all feel the same way. Advice please? Am I a horrible person?