Michelle Williams says it will "just never be right" brining up her daughter without Heath Ledger.
The 'Manchester by the Sea' star has 11-year-old Matilda with the late actor - who died of an accidental overdose eight years ago - and has opened up about raising her only child by herself and how she still can't accept that he's gone.
She told the latest issue of Porter magazine: "In all honesty, for pretty much everything else, I feel like I"m a believer in not fighting circumstances, accepting where you are and where you've been.
"In pretty much all senses but one, I would be able to go totally down that line of thinking were it not for Matilda not have her dad.
"You know, that's just that something doesn't ... I mean, it just won't ever be right."
Meanwhile, the 36-year-old beauty admits she is finding it "really sensitive" learning how to date again and trying to explain her situation as she didn't anticipate she would still be dating in her 30s.
She explained: "Talk about a learning process.
"I think God, what would I say about it? I feel really sensitive about it and certainly did not expect to still be dating at 36 with an 11-year-old. This is not what I imagined."
The blonde beauty also hinted that she would like to get married in the future, although she won't be rushing into anything.
She added: "I am like a cat, I'm a very domestic creature.
"I just want to stay home and take care of people.
"But I'm also happy with myself and just because I might have a desire to be with someone ... that won't lead me to marry the wrong person."
Michelle previously said she keeps life "as normal as possible" for her daughter.
And the 'Dark Knight' star's sister Kate Ledger is impressed with how she is raising the little girl.
She said: "[Matilda is an] expressive, creative, beautiful girl who is fortunate enough to have great grounding from her mum.
"Michelle really does keep things real for her, and her existence, although different from most, is as normal as possible in an abnormal world."