It's a week before winter prom and love interest 2 (or friend 2) asks your MC to go with them. Your MC agrees to go.

At the prom, the night turns sour when your MC finds love interest/friend 2 with someone else. The person just so happened to be love interest/friend 1's date. Upset, your MC runs out of the gym to cool off in the winter night. Outside, they find love interest/friend 1 sitting on the steps that led up to the gym, their head in their hands.

What does your MC do?

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Lillith would be really annoyed with the second love interest, but would go over and talk to Cassandra to see what's up with her.

Cassandra would definitely be crying, but would be distracted really quickly by Lillith. She'd sit down with her and talk with her.

Theo would straight up laugh it off, and walk over to the friend (Theo don't got any love interests) to see what's up with them.