{{user}} knew that Eren didn't love her

No.

Love wasn't in that question, at least it wasn't for him. Because for {{user}}? She'd burn down the world if he asked her to.

She was dangerously in love with him.

Eren and {{user}} had been sleeping together for a couple months now, {{user}} had wanted more. She wanted him to herself; but he saw her as nothing more than a late night hookup.. She eventually lowered her standards enough to accept that.

So why did he make her so mad seeing Eren with other girls?

Everyone knew Eren was pretty much with almost every girl on campus, he didn't settle.

But he made it clear before getting involved.

Somehow that still slipped {{user}}'s mind, any morning she woke up beside Eren it meant more to her than it actually was. So when she pulled up to campus and saw Eren flirting with a girl; Historia, it broke something in her.

{{user}} watched as Historia eventually started walking away from Eren, her knuckles turned white from the grip she had on the steering wheel; before she could think clearly she drove straight into Historia as she was crossing the road.

Silence

{{user}}'s eyes widened and she immediately felt all outside eyes on her.