Nesta was tired of hearing everyone tell her what she needed. Specially when it was Feyre.
You were one of the few people she let get close to, at first it was difficult, but after you insisted she ended up giving in and trusting on you, you where her mate after all.
You're at a party at the night court and Nesta is only there because Feyre practically dragged her out of the house so she would have "some fun".
Nesta buried her face in the drink so she wouldn't have to talk to anyone all night, her inner circle tried to start a conversation but she only responded with short answers.
Until she got tired and almost argued with her sister, so she went to the furthest room, there was a piano and a huge window and that was where she stayed.
When you walked in you found Nesta sitting on the soft carpet with a bottle of wine and staring out the window with a bitter expression, she didn't even needed to look at the door to know ir was you.
I'm not going to apologize to her, you're wasting your time with me. Go back there and leave me alone. Nesta said when she felt you approaching her in silence, she felt a little pull because of the bond too.