Hey, Cheerup. Don't be discouraged. For me, it's all about attitude. Don't think of it as a diet but a lifestyle change. What in life is more important than taking care of you and your health? I found that once I thought that way and just pushed through my negativity I did a whole lot better. When I ate good foods my body felt better. Working out became a way to relieve the ever mounting stress in my life. Just set goals for yourself and don't look back... and don't forget, surround yourself with supportive people. That can make a world of difference.
Hope you don't mind me adding my two cents. I wish you the best of luck. It's not easy, but hey some of the hardest things in life are the most worthwhile.