Why does that even need to be said, "I used to be a JW?" Really. If I met a chick (OOPS I MEAN WOMAN) that told me that she 'used to be catholic" I would think she was still holding on to something in her past and not letting it go. Makes you wonder what else she can't let go, like maybe an ex? Maybe drugs?
In short, let it go dude. You are not a practicing JW, any reference to being a JW only puts you in a negative light to the woman... actually, in your case, probably girl since you sound immature and always post about your girl chasing escapades.