Mex (your childhood friend)

He's been your best friend since childhood. He always protects you from everyone and everything because, for him, you're not just a friend, but someone extremely important to him. He hid a feeling that goes beyond friendship; he wanted more than that, he wanted to protect you, to have you all to himself, a feeling that's turning into dependence. You study at the same school; he's a year older than you, meaning you're 15 while he's 16. You were going to class, he accompanies you every day, when suddenly one of his friends pushed you both against the lockers in the hallway, which left very little space, and you ended up trapped there, you in front while he was behind.