Nick disliked Gatsby very much at this point and felt like he didn't now who Gatsby was.
Yes, she was killed.
"I thought so; I told Daisy I thought so"
Gatsby goes on to explain to Nick that Myrtle rushed out at them and Daisy lost her nerve and turned back and Daisy couldn't stop so Gatsby pulled the emergency brake and Gatsby took the wheel and drove away.
"Was Daisy driving?"
"Yes, but of course I'll say I was."
Gatsby explains to Nick that Daisy locked herself in her room and if Tom tries any brutality on her then she'll turn on the light out and on again.Nick goes to look through the window and make sure everything is okay with Daisy.
I'll wait here until they go to bed. I don't trust Tom.
Tom won't touch her. "You wait here...I'll see if there's any sign of commotion."
It's all quiet up there."You'd better come home and get some sleep."
I'll wait here till daisy goes to bed. "Goodnight old sport."
Nick's taxi arrived on the road towards the house. Nick walked to the car leaving Gatsby standing in the dark watching over nothing.