How to defend the text message sent by my boyfriend when my mother sees it?

Lying is wrong, especially for your mother, who is your closest relative.

Your mother must be doing it for your own good. I don't know how your relationship with your mother is. This is a distrust of her. Telling your mother the truth is the best policy. When your mother knew you had this sign, she didn't say anything because she cared about your self-esteem. I think she said what you said in time and didn't deliberately blame you. It is a kind of love for you, and she is afraid that you will get hurt. Remember, your loved ones will always be on your side. Talk to your mother.

Besides, high school time is very tight. Why not study hard now and wait until you get into college? Keep this pure love in your heart for the time being.