Speaking to HELLO! magazine, the 39-year-old actress said her and Brad have “grown as a couple” since meeting on the set of Mr and Mrs Smith.
“A relationship is one thing when you’re first together and it’s exciting. But now we’ve been together for many years and we have the children, it becomes a different kind of love,” she told the magazine.
“It’s not just being lovers and partners and friends, it’s being a family man, which I love in him and feel very lucky about. My mother was a single mum and she really struggled to keep it all together.”
The couple, who have six children – Maddox, 13, Pax, 10, Zahara, nine, Shiloh, eight, and five-year-old twins Vivienne and Knox – reportedly have no set date for their wedding.
“Nothing is organised. Nothing is ready. I don’t have a dress,” Jolie told USA Today in May.
The stars have been engaged since 2012.