Siva Kaneswaran Engaged to Nareesha McCafferey
12/09/2013 AT 04:30 PM EST
"I found out Nareesha was planning a surprise party on my birthday with her family so I thought [it was] perfect," Kaneswaran tells the U.K.'s Hello! magazine. "I'd bought the ring months before I'd been trying to figure out the right time."
And then Kaneswaran flipped the script on McCafferey's birthday party plans.
"I said to her I wanted a present I would always remember this year by ... for you to be my wife," he said. "It was like a military operation to plan the proposal. I couldn’t even tell the other boys in the band in case they blew the surprise."
But the proposal didn't go exactly has Kaneswaran had planned – he reveals he almost fainted when McCafferey initially said no to his proposal. She has since changed her mind.
"I don't like surprises and he really surprised me, but I was so happy," she says. "I can't wait to start planning the wedding."