Three years is quite a long time to be focusing on losing weight, do you feel that trying but not succeeding to lose the weight is making you unhappy? Do you feel that your appearance and weight reflects your self worth? Maybe just accepting your current body weight would make you happier.

Sorry if I'm coming across as critical or ignorant but it's just something for you to think about

Have you tried EFT for losing weight? I have heard it's an effective.

Take care, Sophie.