that's pretty tough to answer. you won't continually lose weight forever, obviously, but how much you lose and for how long depends largely on how much you are eating. even eating too many primal calories will slow weight loss and even cause weight gain.
however, when your body reaches homeostasis, which is your ideal condition, you'll be in a good spot and may try adjusting things to stay on maintenance. bear in mind, weight is not all that matters. at 5'9", weighing 100 lbs would be way too thin, so you want to keep exercising to maintain or add muscle. also, focus more on measurements and body fat percentage more than weight. how much you weigh doesn't really tell you as much as other measurements do.