The 28-year-old actress, who tied the knot with Klaxons keyboardist James Righton in July, said she loves their relationship but does not take it for granted, reported Contactmusic.
"I guess it feels good until it doesn't. At the moment it feels good, we'll just hope it stays that way," she said.
The brunette beauty had dated '50 Shades of Grey' star Jamie Dornan, 31, and her 'Pride & Prejudice' co-star Rupert Friend, 32, in the past.