Liking her is your business. Whether she accepts it or not is her business. There's nothing to be afraid to face her.
Since she knows, she knows.
Either boldly go after her. Even if she rejects it or refutes it, it's no big deal. If she is a girl who understands things and knows how to do things. Even if she rejects you, she will give you face and take care of your feelings. If she is a timid girl, or a girl who doesn't know much about things, and handles it badly. Hurt your feelings, you do not care. Everyone is still small after all.
Don't dare to chase, just continue to crush Luo.
Whether you chase or not chase, was rejected or not. One thing to remember. Do not affect the school. The first time, there is a favorite girl is very normal. But to deal with it. Girls in your life will not lack. But learning can not start over. Time cannot be rewound. Love is not the whole of life. You are responsible for your studies, your future and your life. And your parents.