updated 09/04/2012 AT 4:00 PM ET
•originally published 09/05/2012 AT 10:00 AM ET
It’s been three weeks since Avril Lavigne and Chad Kroeger wowed the world with the happy news of their surprise engagement. But one person who isn’t paying attention to everyone else’s reaction is the Nickelback rocker himself.
“I try not to take too much interest in the world’s opinion of our relationship,” Kroeger, 37, tells PEOPLE. “I just know the both of us are very happy.”
Lavigne, 27, and Kroeger met earlier this year while collaborating on music for her forthcoming album. Their professional relationship took a turn this summer when they started dating on July 1 – which happens to be a special day for both Canadian megastars.
“We think it’s very cool that our anniversary will always be on Canada Day,” Kroeger says. “We can’t wait to start our life together.”