I've had that fascination with Judaism for much of my life. When I was much younger, I remember being very interested when anything related to Judaism was discussed and I was always personally offended by antisemitic comments people would occasionally make. There was one racist, anti-semitic putz in high-school who thought I was Jewish. He was right, I started attending shul in my first semester of college and converted a couple years later. I have found that the Jewish culture is the only where place I fit in and feel slightly normal. I heard an interesting concept that people who convert to Judaism were always Jews on the inside, and its not like we go out trying to get people to join the tribe (okay, in a mixed marriage, sometimes the non-Jewish spouse will convert).