If you want to suggest that you have a good opinion of a boy, here are some methods that may be useful:
1. Actively communicate with him: Try to communicate with him in social occasions and let him feel that you are interested in him. Ask him what he thinks of a topic, or share some of your life experiences with him.
2. Pay attention to him: Look for some special places in his words and deeds, and pay attention and praise. This can make him feel your attention to him.
3. Share yourself with him: Share your life experience, hobbies and dreams to let him know more about you. It can also make him feel that you are an interesting person.
4. Encourage and support him: When he encounters difficulties or challenges, give him encouragement and support to make him feel that you are a reliable person.
Remember, the most important thing is to respect his feelings and not to force or offend him too much. If he doesn't show interest in you, don't get too involved.
Liking is different from love. Liking may just be a good feeling for someone, while love is a deep feeling for that person. Therefore, it is normal for a boy to have a good opinion of himself. However, you need to ensure that this goodwill is healthy and does not bring unnecessary pressure to him. If you feel the same way about this guy, you can consider further developing a relationship with him. But please note that love and love are different, and do not have unrealistic expectations of him.