Miss my actual friends

This person kinda just made me their friend. I didn't really want to be but I didn't care at first. Now they're taking over my life. Constantly texting me, hugging me and clinging on to me at school which makes me feel claustrophobic. Their making it impossible to spend time with my actual friends. They make me feel like I'm surrounded by walls closing in on me. I want to fade of the friendship but they're making it impossible! I miss my friends and I'm scared they'll stop talking to me because of that person...