The boy takes the initiative to help you change your resume, which shows that he cares about your career development and personal growth and hopes to establish a closer relationship with you.

1. He cares about your career development and personal growth: He may think that your resume can better show your abilities and characteristics, and he hopes to help you improve your professional competitiveness by modifying and making suggestions. In this case, you can thank him for his concern and suggestions and listen carefully to his suggestions for revision.

2. He wants to establish a closer relationship with you: A boy may want to help you modify your resume to express his concern and support, and hope to further establish a closer relationship with you. If you have a good impression on this person, you can express your gratitude and your friendly attitude.