The midfielder also says the club are aiming to finish higher than they did last term, but admits progress will take time as players settle in.
The midfielder was secured in a deadline day swoop on Tuesday, signing on loan from Barcelona, having taken in a similar spell at the club last season.
Things have changed dramatically since he left at the end of last season, though, with Bilic having replaced Sam Allardyce in the dugout and a whole host of new faces drafted in during a rather hectic summer transfer window.
The upheaval could have given Song second thoughts about returning to the Boleyn Ground, but he says he jumped at the chance when it was put to him.
“When I spoke to the manager we had a very good chat. What he wants is someone who loves playing football,” he told whufc.com.
“For me it was very easy when I spoke to him because it’s important for me to go somewhere that the manager really wants you. It was the same last year with Sam – he really wanted me – and so did the new manager. I said to him straight away that I would play for him and do everything to come here.”
Players will need time to settle
The Cameroon international midfielder has also revealed that it is the ambition of West Ham to do better than they did last year, but accepts that will not be an easy task.
Bilic was brought in to replace Allardyce after fans and owners alike became disillusioned with the football on offer, with many saying that their boss simply did not play the West Ham way.
They have started this season playing the brand of attractive football an expectant fan base crave, to mixed results, and Song says new players will take time to settle, although those already at the club will help to speed that process along.
“The ambition the club has is to finish better than we did last year,” he added.
“It’s not easy because when you have new players coming in they have to settle, but the people who are here help do that. That’s what happened for me last season and when I’ve watched them this year, they’re doing very well.”