I think I'm in love with my best friend?

I married my best friend. Of course, I didn't even meet him until I was 16, but this is the case. We were best friends for a while but were kind of flirty the whole time. He always called me his little sister and I called him my big brother, although the relationship definitely didn't turn out like a sister/brother type relationship. Anyway, he asked me out, and the rest is history.