I lie to my mom about my relationship

I use to be so happy. No matter what, I always was happy. I got into a relationship with this guy. I love him so much. We're both teenagers. The week after his birthday, my mom made me stop talking to him. It broke me. He came to my house and talked to her, and she let us date again but not see each other. He comes up to my school every day and it tears me apart that I have to lie to her.