To let go of regret and lose weight, it’s essential to focus on developing a positive mindset. Start by forgiving yourself for any past mistakes or decisions that may have led to weight gain or unhealthy habits. Instead of dwelling on the past, focus on the present moment and the future. Set realistic goals for yourself and commit to taking small steps each day to achieve them. Focus on the benefits of healthy habits, such as increased energy and confidence, rather than the negatives of past mistakes. Practice self-care, including getting enough rest and engaging in activities that bring you joy. Celebrate your progress, and remember that change takes time and effort.