"He's so excited for me and happy for me. Hef says if I want to come back to the mansion and bring a date, that's no problem," says Marquardt, who moved out of the Playboy mansion last week after living there for seven years.
"He's just being really sweet about it. We have gotten closer than ever. I will love him forever, there's no question."
Marquardt's departure from the house follows that of fellow Girls Next Door star Holly Madison, who is now dating illusionist Criss Angel, and Kendra Wilkinson, who is engaged to NFL star Hank Baskett.
Shock to SystemMarquardt, 35, says it was a shock to her system to leave the mansion after all this time.
"I packed the final stuff from my room," says the Playmate and host of the upcoming Travel Channel show Bridget's Sexiest Beaches (debuting March 12 at 10 p.m.). "I was standing in my room and it was totally empty. I was just thinking, 'I can't believe this.' "
While she's saying goodbye to Hefner for now, Marquardt knows there will always be a place for her at the Playboy mansion – if she needs it.
Says Marquardt: "Hef's like, 'You can always come back here. Come back to eat all your meals. Come here to spend the night if you need to.' "