If nothing else works for you and you're morbidly obese, consider having bariatric surgery for weight loss. However, since this requires removing or blocking off part of your stomach, and can cause plenty of complications, it should absolutely a last resort in your weigh loss battle.
No person is an island, so do what you can to recruit a dieting buddy or a cheerleading section to help you with weight loss. It's a lot easier to keep your mind on exercising and dieting if people are there supporting you and pulling for you to lose weight.