This is not a question. This is a message I have got to a young teen who loves the colour red.
It is important to tell your mum about the situation. You don't always see eye to eye but she will support you in this 100%. Your friend is not being honest with you, and you have a tremendous amount of growing up to do. If you need further guidance feel free to ask, I will always try to give you my best and honest advice.
