healthy weight and motivation?

Ashley Asked: healthy weight and motivation?

I just turned 18, I am 5'9, and I weigh 130 lbs.
I feel super fat and it bums me out a lot, and no matter how hard I try, I cant lose weight and keep it off, and I have trouble with sticking to exercise and diet plans. What's the ideal weight for someone my height? And what do you do to motivate yourself to stick to your plans? Muchlove and many thanks xo