APPLE ID MESSAGES HELP!?

so i’m texting my friend and they tell me that my apple id email is coming up when i’m texting them, which is weird because since day 1 it’s always been my phone number then out of nowhere when i’m texting, my email is popping up... i went to settings>messages>then send and receive but it looks like this ?... show more so i’m texting my friend and they tell me that my apple id email is coming up when i’m texting them, which is weird because since day 1 it’s always been my phone number then out of nowhere when i’m texting, my email is popping up... i went to settings>messages>then send and receive but it looks like this ? (the screenshot i linked below) and i want to put my phone number as the number i can receive and reply from but it’s refusing. i don’t know what to do and my friend can’t change the contact name because it’s an email.