(Cover) - -No story type selected- - Michelle Williams says Heath Ledgers death has left a hole in her life.

The actress dated Heath for three years after they starred in Brokeback Mountain, and in 2005 she gave birth to their daughter, Matilda. The pair split two years later, and in 2008 the actor tragically died aged 28 following an accidental overdose on prescription drugs.

Michelle says she and her daughter are still dealing with Heaths passing and claims it will be impossible to ever fully get over it.

"Obviously, for me and for [Matilda], there's a hole in our life. Of course the natural inclination is to want to fill it and make it disappear, but what I've come to recently is that it's impossible. Nothing will fit in that hole because what we want back we can't get, which is this one person, she said in an interview with the February issue of Marie Claire magazine. I'm not going to rush anything and scamper around like a mad person and make myself crazy. I'm trying to be respectful of the absence. I'm not trying to fill it up. It is what it is."

The 30-year-old star was so devastated by Heaths death she had to take a break from her career. She admits she still didnt feel ready to act again 12 months after her hiatus and had to be convinced to return to work.

I didn't work for a year. I needed to gather myself and put my life back together, she explained. I had to be dragged back to work, basically, because I finally had my life in some kind of order, and I didn't know what would happen if I introduced work into it.

Michelle also addressed rumours she is dating her Blue Valentine co-star Ryan Gosling. The pair have sparked reports they are smitten with each other since they starred in the steamy movie, but Michelle insists they are just friends. She confesses her mother would love her to start dating again, but she doesnt want to commit to another relationship unless she is serious - for the sake of her daughter.

My poor mom really wants me to meet someone. I think she wanted to believe the Ryan Gosling rumour more than anybody, she revealed. The idea that you can get everything you want in one person is destructive. And maybe when you accept that the number is closer to 50 or 60 or 70 percent, that's when you can start to make some progress in choosing the right person.

I don't want to make a mistake that big, and that saddens me, because it's harder to let yourself go. I can inflict any kind of injury on myself, but with my daughter, that's not an option." (C) Cover Media