Lexa couldn't remember walking back to the room, but somehow she made it back with Clarke. She sat on the floor with her head in her hands and her back to the wall. How could she be so foolish to think that she could outrun her past? And surely Clarke would see how screwed up she was, and a promising friendship would be ruined.

It's all your fault, her own voice echoed in her mind. You killed Costia.

FLASHBACK

"We're running late," Costia complained, tugging on her girlfriend's hand. "I don't want another detention."

"So we take the shortcut," Lexa responded.

Costia pales at the thought. "No. The back alleys are dangerous."

"That's only at night," Lexa reassured her. "Besides, we're running late."

Hesitantly, Costia agreed, and Lexa led the way. The alleys were quiet, which seemed to assure Costia. Lexa had never been afraid of them in the daylight and often used them to get from place to place. She knew them by memory.

Just as she turned the last corner, the couple came across two other people: a bearded man, and a woman who Lexa recognized as a suspect from her parents' murder. Nia was her name, and she was from the same Azgeda gang that killed her mother and father. Lexa froze in horror, staring at the two in front of her with guns fixed on each other.

The man stopped to look at them, and Nia didn't hesitate to use the distraction to shoot him. She then turned the gun on the kids and shot before running off. Lexa turned in horror, following the bullet's path straight into Costia's stomach.

Costia fell, and Lexa held her. She phoned the ambulance, but her girlfriend was dead by the time they arrived.

PRESENT DAY

She was breathing too fast, but she couldn't get enough oxygen. Her surroundings faded into oblivion, and she could barely make out Clarke's voice, telling her to breathe slower.

Lexa tried, but she couldn't get control of herself. Her head was dizzy, and she felt as if she was about to pass out. Suddenly, a brown paper bag was pressed up against her mouth. She took it in her hands and held it there, letting it calm her down.

When she became aware again, she realized that Clarke had wrapped her up in her arms and was holding tightly. Awkwardly, Lexa pulled herself out. Her cheeks flushed bright red as she pushed herself into a standing position. "Thank you," she muttered.

"You're not the first person I've had to calm from a panic attack," Clarke explained as she stood. "Don't worry about it."

Lexa felt as if she owed her roommate some explanation for her behavior, so she began speaking. "I was a witness to a murder. I'm the one who got Ontari's stepmom executed," she explained, leaving out the key details. "She hates me. She can't know that I'm here."

"It's ok," Clarke said. "I'll get the school board to reopen an old case. I'll get her kicked out."

"You would do that for me?" Lexa asked, a warm feeling settling into her stomach.

"Of course," Clarke replied. "You're my friend."

Lexa turned away so Clarke wouldn't see her smile. Butterflies fluttered in her belly before dying of dread as Lexa realized what was happening.

She was falling for her roommate.

She thought she'd never love anyone again, not after Costia. But Clarke had made her feel accepted and even cared for, and now Lexa couldn't stop herself from wanting to give her heart to the other woman. But she wouldn't. She knew she couldn't ruin there friendship. Besides, Clarke was probably straight, and even if she wasn't, how could anyone love such a broken mess?