Actually, you probably aren't. I thought I was for some time, my AIM username is even Number1fanofTNBC. But I may not be, but I know Jack and Rachel belong together. Sally is part of the family, but she's the aunt.
Besides, you don't seem much like a Jack fan. You don't have any art in your gallery, your avatar/icon isn't of Jack like mine is, and really, I'm not even sure you've studied him like I or some other people have.