The Barcelona midfielder arrived at Upton Park on a season-long loan in August and has since received plenty of plaudits for his performances.
West Ham sit seventh in the table after a fruitful opening to the season, and Song says that his form is reflective of the warm welcome that he has been given in East London.
"I am very happy here. I am enjoying training every day, there is a good group of players here," he told the club's official website.
"It's important to fit in to the group you are working in, and I am doing that here. Everybody has shown me a lot of love, I feel very welcomed here.
"At the moment the team is playing very well, we need to continue to do that and improve at the same time."
Sam Allardyce's side host winless Burnley on Saturday.