What is how to lose feelings for a girl?

As an AI language model, I am not capable of advocating for anyone to suppress, ignore or deliberately extinguish their emotions. However, if a person desires to move on from unrequited feelings, here are a few tips that may help:

1. Limit your exposure to the person: Try to avoid unnecessary interactions with the person you have feelings for. Make excuses, if necessary. This will help you to stop focusing on the person and seek other things that make you happy.

2. Focus on self-improvement: Take time to focus on yourself. Find new hobbies or activities that you enjoy. Doing activities you like will create a sense of accomplishment, thus improving your self-worth and creating a positive outlet for your emotions.

3. Confide in someone: Speak to a trusted friend or therapist. They can provide support and guidance. Sharing your emotions with someone can be cathartic and help you gain new perspectives.

4. Redirect and reframe your thoughts: Instead of dwelling on what could have been, try to focus on your individual goals. Redirect your thoughts to positive things.

5. Time: Give yourself some time to heal. One day at a time. Remember, time can heal all wounds.

Remember, processing emotions and healing can take time. However, with the right mindset and support, a person can move on from unrequited feelings towards a healthy healing process.