I am writing to apologize for not saying goodbye to you. It was very impolite of me to do so especially as we have been built good friendship.
Because, shortly after the visit, I received exciting news from my mother, saying that my wife had borne a son ahead. I was so pleased at that news that I couldn't wait to return home to see my lovely son and great wife. I left so hurry that I forget to tell you. I feel terribly sorry for that.
To make up for my thoughtless behavior toward you, I want to invite you to come and stay with my family during the vacation. I believe you will understand my feeling of being a father and husband and accept my sincere apologies. Please tell me as soon as you make a decision.
First of all please accept my most sincere congratulations. Congratulations on your recently promotion to be a father. I received this message not long after you left. As your friend I can understand your excitement. Your wife and child are all well, and I will definitely come and see that cute little guy. I think that I am so happy for you.
What a happy day it is to witness a new-born come to the earth. We are old friends for many years; I can understand your feelings. Please convey to your family my best wishes. I also hope the baby can grow up healthily and happily. This holiday I will go to see my cute nephew.