Geez - straight from FOX (FAKE) News.
Fact Checker:  http://www.politifact.com/truth-o-meter/article/2017/jul/11/trump-tower-meeting-russian-lawyer-raises-legal-qu/

Keys that refute your biased re-telling:

"Goldstone informed the younger Trump that Moscow supported his father’s candidacy, and told of his connection to a Russian government official with incriminating evidence against Clinton.

"This is obviously very high level and sensitive information but is part of Russia and its government’s support for Mr. Trump," Goldstone told Trump Jr.

The younger Trump replied: "If it’s what you say I love it."

Per US law - doesn't matter who started the conversation, accepting or intending to use foreign influence in a US election is a crime.  PERIOD.

Goldstone said Russian government official (latest evidence shows that the female lawyer holds valued Russian gov't position) - anyone who knows the law, first step - call the FBI.

Your account of when he left meeting is not supported.