Am I a major F up orrrr??? 😭

This guy and I started sleeping together about a year ago after another 2 years of already being friends. It was just casual hook ups. I started getting feelings and I told him about them and he didn’t feel the same way. We continued to be friends with benefits anyways. We started spending more time together, more time with each other’s families. I built a good relationship with his little sister and his mom. He was one of my best friends. Last month, he went to visit his cousin for a week up in Sudbury. During this week, he did lots of hard drugs and drank a lot. He snapped me one night telling me he loved me so much, he wanted to date, he wanted to have a family with me, and that he wanted to spend the rest of our lives together. It made me so happy by what he said. When he told me this, I didn’t say much back as I knew he was high and drunk. Days later, when he was sober on the train coming home, I asked him if he truly meant what he said and he said “yes”. I was very happy to hear his response. A few weeks or so later, I got sick of him always drinking and doing drugs so I downloaded Text Plus on my phone and texted his mom telling her that he’s doing hard drugs. I wasn’t thinking about the outcome and the consequences that would occur in sending this text. My friend was stressed out as he had no idea who this person was who texted his mom. I pretended like I didn’t know anything about this situation and encouraged him by saying that everything was going to be okay. He managed to convince both his parents that he doesn’t do drugs. I heard that they were tracking the number so I got scared and confessed to his mom and dad. His mom still didn’t believe me. In fact, when I told her, she apparently wanted to laugh at me cause a tear rolled down my face when I brought up my cousin who OD’d earlier this year. His mom told him that it was me who texted her. I tried to talk to him about it to explain that I did it because I deeply cared about him. Instead, we had a heated argument with him calling me names like “psycho”, “cunt”, “crazy”, “liar”, “fcked in the head”... He told me I lied to his family, but no where did I lie, simply told the truth about his drug use. He told me that he lied about his feelings for me up in Sudbury because he knew that I liked him. He told me that we could never work out because I’m so crazy. He never wants to speak to me again and he doesn’t want me talking to his family no more. I genuinely told him mom because I was concerned about him. Is he over-reacting? Or did I just really mess up bad?? I feel heartbroken because I lost a best friend. I’m hurt by the way he talked to me and called me extremely rude names. How he said I lied, but no where did I lie. I pretended not to know about the texts when he showed me and we didn’t talk about it much. He left yesterday for a 3 week Australian exchange so there’s no way in talking to him. He blocked my number and I deleted him off all my social media.