Nick meets the Gatsby at one of his enormous, fancy party, speak/communicate and become friends. Although in the book it seems like Gatsby kinda set up them meeting but it doesn't say that.
SHE NEVER LOVED YOU!
Tom has a affair with Georges wife Myrtle and brings Nick along to test his loyalty to him vs Nick to Daisy, show off his manliness and to make it seem like what they were doing was natural.
Gatsby wishes to see Daisy and explain his love for her and asks Nick who kindly obliged and kinda goes overboard with the flowers.
Tom goes to a party in the West egg to see what Daisy is up to and confronts Gatsbys and Gatsby's tells Tom Daisy never loved him and they argue and it gets intense.
After leaving tom's house in Gatsby's car Daisy hits Myrtle gatsby tries to clean up the evidence for her and puts his car in his garage, which is later found and george is told Gatsby's killed his wife.
Gatsby dead, shot by george thinking gatsby killed his wife while at his pool and last thing he stared at was the green flashing light across the river also george killed himself right after.