Congratulations on your upcoming marriage!
If you want to resist all the unhealthy practices (binging, dieting to an unhealthy weight), a professional counselor (psychologist or therapist) can be your best friend. Preparing for a wedding is usually very stressful. In that, you need all the help you can get.
The tools here on fitday will help you to know that your diet is healthy. Your health is the most important thing!