Don't lose faith...there must be a way for you to lose weight permanently.
In my opinion, from what I've learned and tried by myself, losing weight is a complex matter that is up to many factors. There is no 'one size fits all' diet plan because each of us is unique. Here are some factors that could effect your weight.
- Life style ( active / non active ) This will affect your metaboilsm rate, too. But I can see that you are quite active because you excercise.
- Eating habit and addictions. Do you drink alcohol and coffee? Do you smoke? Try to cut those things out. If that is not the case, let's see the next one.
- Your genes and your health condition. Some time you might be allergic to some food that you don't know. This is can relate to your weight gain as well. Some diseases may effect your effort in losing weight. This one you have to explore by yourself or consult with a dietitian.
- The accumulated toxin in the body or parasites. If you are not sure about it. Detox your body will clean your systems and you will feel much more lighter plus, you will lose weight. Anyway, consult a doctor if you have any illness and can't detox.
-Some medications like birth control pills. Sometimes being a woman just make us more prone to getting fat than men. You may need to increase your metabolism rate and try to limit your medication as you can.
Here is a hub about increasing metobolism. I think he's done a great job.
And don't stop drinking water. It's good for you. Don't drink too much in a short time. Try to drink through out the day. Don't worry about your belly, it will be flatten over time as you gradually build muscle on that area. Water will bother your belly no more. :P
I hope this will help you in some way. You will surely know yourself better than anyone. Don't focus on losing weight alone. Try to adjust everything in your life as a foundation to a healthy life which will make you have a perfect body and glow in the long term.