Garth, 40, announced in March that she and her 'Twilight Saga' star husband Facinelli were splitting after 11 years of marriage, reported Contactmusic.
"I think there will come a time when it won't sting so bad. But I'm not quite there yet. You know, I am happy that he is happy, though.
I'm dating one guy right now," she said.
Garth and Facinelli, 39, have remained friendly for the sake of their three daughters, Luca, 15 Lola, nine, and Fiona, five, and she said that they have worked out an agreement for sharing custody over the festive season.
"We are co-parenting and getting the hang of it. We will celebrate really quietly at home this year and then travel to see a friend in Virginia. Then their dad is picking them up and taking them skiing, so they have a lot of exciting things going on."