Hi there and welcome to 3FC!!! This is a truly remarkable place for support, advice and encouragement. I'm glad you're here.
Losing weight is a very doable thing. I finally realized that and that was the turning point for me. I realized that if I didn't want to be fat, well then I didn't have to be. It was something I really could control. It was within my power.
I always had lots of things to motivate me, first and foremost my health. I was terribly inactive and totally miserable. But having motivation was not enough. I needed to make a
commitment, that no matter what, once and for all, I was going to make my health and therefore my weight, a top prioritiy. Once I made that commitment, it didn't matter whether I was motivated or not. That motivation would come and go and not always be at the forefront of my thinking, especially when faced with tempting food. But the commitment is always there. And now my health and my eating choices are always at the forefront of my mind.
You most certainly CAN lose enough weight to see a difference. I know this for sure. It does take some patience though and lots and lots of determination. Weight loss is not an instant gratifaction type thing. But rest assured, it is without a doubt the most rewarding and wonderful thing you can do for yourself. Your patience will pay off. As will your hard work.
You also mentioned that you've tried every diet. Well, diets come and go, that being the problem. When you make that commitment, it's got to be for a lifetime. So, in order for this to "work" longterm, forever in fact, you need to find something that you can do forever. No quick fixes here. It's about incorporating healthy habits and healthy eating into your life.
I find it very, VERY beneficial to have all my meals planned out. This way there's no suprises and I KNOW what I am eating at every meal and every snack. It makes it much easier to make good choices this way. I keep my home stocked with healthy foods, such as low fat proteins, fruit and ton and tons of vegetables. I bring healthy snacks along with me where ever I go. I make delcious, healthy low cal meals. That was key for me. I needed to find foods that I enjoy. If I enjoy my on plan meals, well then there's no reason to go OFF plan.
I look forward to getting to know you. Good luck!!! And please remember, that you absolutely, positively, without a doubt - CAN do this.