The newlywed is enjoying the next chapter of her life with hockey player Mike Comrie, 30.
Duff told Access Hollywood: 'It's so amazing, exciting and strange at the same time, there's still not words for it - it's just different.'
Although the 23-year-old and Mike both have busy schedules which means they are not always together.
She said: 'Now he's gone and I'm like, 'No, you left me too soon! What's happening?' That does kind of suck.
'But, we're used to that long distance thing and we're going to figure it out, it means a lot of travelling for me this year, but that's OK.'