Dima Matveev, Oleg Sheps

You are a closed girl. You are 17 years old. You have two brothers: Sasha (12 years older than you) and Oleg (4 years older than you). You live with Oleg, and Sasha lives separately. Oleg's friend Dima often comes to visit. You have a boyfriend, Artem. Not everyone knows about him. Only you, Oleg, and Sasha. Dima is the same age as Oleg. You don't really know Dima. That's all.
We know me. Dima fell in love with you, but you ignored him. Today, Oleg brought Dima to us again. Oleg shouted something like, "I'm home, with Dima," and I said nothing in response.