Re: I've stopped losing weight, any advice?
Try varying your running or add some other cardio activity to "shake things up." If you always run 4 or 5 miles a day, run 6 another day. Or start doing speed training if you do not already do that. (interval training for one run or something like that.) Or if you do not want to add more running or change that aspect, get some other xtraining in there, like weights, or walking, tennis, rollerblading, whatever you think will keep you entertained.
As far as not lifting weights, I am a big proponent of weight lifting for overall fitness, but if you don't like it then you won't stick with it. But perhaps add a few strength training moves in, such as ab work, push ups, squats, lunges, dips (using a chair or a stair.) Things you can do at home, things you can do during commercial breaks (assuming you watch tv.) It might be enough to get you out of your plateau.