Show your advantages in front of him, and show that you are gentler and more understanding than other women. Try not to pester him and let him find his own way. It's best to make him realize that if he doesn't cherish you, you will be taken away by others. Enthusiasm for a few days, and then indifference for a few days, so that he can not adapt. Stick to yourself and don't show too much enthusiasm to him, otherwise he won't take you seriously. But he needs to keep an eye on you.
Try to understand the living habits and rhythms of boys through some channels. Don't be too deliberate, it will be more conspicuous and easy to be seen through. Just pay a little attention to the small details of boys' clothes, what kind of books or novels they like to read and what kind of games they like to play.
After learning about boys' living habits, such as he likes to play the glory of the king or lol, girls can also study and try to interact with boys in games. Or admit that boys are masters, which will also increase your mutual understanding.
If you are like-minded, or have something in your personality that attracts him, then you should create some opportunities to get along with him, let him get to know you constantly, find many advantages and attractions in you, and then the other person will notice you! However, it is not the most important thing for the other person to notice you. The most important thing is to notice how to like you in the future.