How do you make yourself determined to lose weight?

Before I got married, my weight was actually very standard, I was 5'8" tall and weighed 150 pounds. After I got married, my weight went up, and every time I saw my friends, they would say, "You've gained weight". And really let me have the determination to lose weight, or because all my clothes simply can not wear. From the end of this year, I began to lose weight, and now the weight has lost 15 pounds, so I will persist.