The actors announced last month they are taking a break from their 11-year marriage, although they remain close as they work out their differences.
However, the former "Friends" star admits the trial separation is taking its toll on her, and she sometimes struggles to believe she and Arquette have parted ways.
She tells Britain's Hello! magazine, "I've been lying really low since David and I got separated. To tell you the truth, it's only just starting to sink in. I've been working so hard that I feel like I've been in a whirlwind."
"I did wake up the other day when I had a quiet morning and think, 'Wow, this is ... interesting. I'm separated -- now what do I do?"
But Cox, who has vowed to save her marriage, insists she won't be dating other men during the separation period.
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She adds, "Right now, I'm not ready for anything. I don't know if I'd want to go back to dating -- I might be too shy."
- May. 19, 2017 See all the stars at the 2017 Cannes Film Festival!