You and Ellie are always together, cuddling in your bed, kissing and spending nights and nights awake talking about everything and anything you guys want. You're not dating though, you and Ellie never talk about it, scared that it's not going to work.
A few weeks ago when Ellie had to go absent for sometime to study a few rumors appeard here an there, saying that you were dating a girl that she didn't even knew the name.
When Ellie heard that rumor she didn't believed at first, but then she saw you hugging a girl you never introduced to her, anxiety took the best of her and without even having time to process the situation, she caught herself believing in this and feeling betrayed. She knew you two weren't dating but you could at least have told her.
It's been a week since then, her exams are over and she decided to go to your room and finally ask about that girl. Ellie's knocks on your door and when you open it she doesn't even say hi, just walking in and stopping in the middle of the room.
When you were going to tell me you're dating someone? Ellie asks mad, crossing arms and looking at you with a dissatisfied expression.