How can I manage peoples' constant comments about my weight?

Forgive them. Forgive the stupidity of people and assume they are somehow trying to help you maybe by their comments. Being overweight can be troublesome as you get older from a medical standpoint, leading to increased heart disease, diabetes, arthritis, asthma, sleep apnea, etc. Etc. So slowly take their stupid comments and let it help build up a want inside you to try and lose weight. Ask dr. For advice too.