He took everything from me

He (18 M) broke up with me (17 F). He was my whole world. He took that away like it was nothing. I thought we were going to grow old together. I can’t see the future anymore because I’ve always pictured it with him. He was my best friend. I loved him so much. I don’t know what to do with myself anymore. I’m so so angry at him. He promised me forever. He promised me he’d never leave me. He promised me our relationship was forever. 

Even when he knew he wanted to break up with me, he continued to tell me those lies!! He was the most honest person I knew. How am I supposed to trust anyone again? I’m SO angry. I don’t know how to stop being angry because I can’t tell him how angry I am. “We’re never going to speak again.” He said. “We are strangers.” 

I wish I could just be his friend!! Our friendship was pure and the connection was incredible. It was the relationship that got toxic. He said we can never be friends. I miss my best friend. I have friends but now I don’t have my person. I’m struggling. Help me.