It's okay Daisy. We are together again and that is all that matters.
Jay, why did I ever leave you?
When Daisy and Jay first began to talk, they were still recovering from the initial shock of meeting each other after so long. Daisy thought she would never meet Jay again and Jay had only waited to meet her after five years.
After they had recovered from the initial shock of meeting each other, they began to talk about what had happened with their lives during the time they were apart. Jay tells Daisy his false life story and Daisy begins to learn about his past which may or may not include his wealth.
They begin to talk about their person lives more openly now, and both of them are no longer embarrassed. Daisy is crying since she has met the person that she truly loves and his personality is still there after all that time. Jay is just excited to see her again and they both show their emotions without trying to hide them. Daisy speaks about her unloving relationship with Tom to Jay most likely, which is also a reason why she is crying. Gatsby is listening and comforting her until Nick comes back in.