You can lose weight, do not give up on yourself. You deserve to be healthy and happy, no matter what weight it is you can achieve those feelings at.
If you struggle with doing it on your own, have you tried to meet with a nutritionist? Not a Jenny Craig type (although some of them are really wonderful people like my sis) but an actual medically trained nutritionist? Or work with a trainer at the gym to maximize/learn about what might work best for you?
I can't lose weight at 1,300 calories a day unless I'm skiing or mountain biking on a daily basis, but I have very sluggish metabolism and some thyroid issues. Have you had a full blood work up to determine if there's an actual physical medical reason contributing to your weight?
If you are an emotional binge eater, perhaps talking to a counselor/therapist might also help give you ways to more productively focus your energy?