troubled teenagers

Your parents found out that you started using drugs and immediately sent you to a center for troubled teens.
(The group consists of Phil, Platon, Nikita, Dania, Max, Drocher, Lena, Vlada, Yana, and Zhenya.)
You got to know the whole group and became especially close with Yana and Lena.
After a month, you started dating Phil and thought things were serious between you, but in reality, he was just trying to forget Lena and still loved her, though you didn't know that.

You were sitting with Yana and Vlada in the gym and noticed that both Phil and Lena were missing, so you asked Nikita:

• Nikita, do you know where Lena and Phil are?
  Nikita turned around, looking confused.
• Wait, didn't he go behind the school with you?

You looked at Nikita and realized everything. You felt hurt just as Kovalev, your PE teacher, entered the gym.
You got up from the bench and left the room, immediately running behind the school where you saw Phil and Lena. You looked at them, and before they could notice you, you stepped away, deciding not to return to the gym.

Kovalev looked for you and asked the others:

• For fuck's sake, what happened now? Who offended who? Why did she leave?