Credit: Lester Cohen/; Joe Corrigan/Getty Images

In the July issue of Playboy, Cameron Diaz opens up about the men in her life.

First on the list: Alex Rodriguez, with whom she enjoyed romantic dinners and whose NYC apartment she was once spotted leaving one morning in May.

"No, no, no," Diaz, 37, says when asked if they're an item. "I've been in relationships since I was 16-years old. In the past three years I’ve made a conscious decision not to be in a relationship for as long as I want. I've stayed away from all the traps out there for me to just fall into something that will potentially lead me down the same road ... I want to have a relationship with myself right now."

Diaz - who headlines the action-comedy Knight and Day (out June 23) -- recently reunited with ex Justin Timberlake for the romantic comedy, Bad Teacher.

Us Weekly reported that he "tortured" girlfriend Jessica Biel by taking the role. But Diaz insists she has nothing to worry about.

"We're adults," she tells Playboy. "Of course, we could work together. It’s been three years since we broke up. It's all done ... We're friends; he's really talented and funny, and we're good at being funny together. A great dynamic we have is that we love laughing together ... he's so hilarious."

When it comes to her love life, "I never shut down any man who’s willing to ask me out unless he’s a total douche bag," Diaz says. "It takes a lot for a guy to ask out a girl like me – not because I think I'm superspecial or anything. It’s just that I think men are intimidated, and it’s a lot to get involved with. It’s not uncomplicated."

She says she's "had really successful relationships, even though they’ve lasted only a certain amount of time. I’m okay with that. With some of the relationships that have drawn public interest, I feel as though I’ve evolved, learned and become better equipped. I don’t feel I need to make it different for the outside world that’s looking in and judging it.”

With love, Diaz says she doesn't rule anything out.

"Sexuality and love can be different things," she says. "I can be attracted to a woman sexually, but it doesn’t mean I want to be in love with a woman. If I’m going to be with a woman sexually, it doesn’t mean I’m a lesbian. We put these restraints and definitions on people, but it’s hard to define.”