The Importance of Talking to Girls

She left me on open and she'll hardly look at me at school. She doesn't even wait for me to walk with her to the next class. It's like I'm invisible to her but I don't know how to say this all to her in person. We've been best friends since preschool so it's not like I can just stop being friends with her. If you can build up the confidence which you deserve to have, try to talk to her.