He sees it as his best chance of going to the 2014 World Cup finals with Holland.
He revealed: "It's every footballer's dream to play in a World Cup. Now I'm in the squad, I've got to take my chance. I feel confident we will make it to the World Cup and, hopefully, I can be a part of it."
De Guzman added: "Winning the Capital One Cup and doing so well with Swansea, as well as winning a Dutch cap, is all a bonus for me.
"It would be good for me to stay here."