The Hollywood couple announced its separation back in October (10), but both insisted they would continue striving to work through their problems.
Arquette admitted himself to rehab in January (11) to address his drinking problem, and now he's revealed he has been reading about human behaviour in a bid to improve relations with Cox.
He tells ETOnline, "We're separated, we're working on ourselves and our relationship, and sort of figuring out what we want. You know, life's complicated and people go through changes. And I've been reading a lot of things about myself, reading books that talk about feelings and changes, and she's been working on herself a lot too. The great thing is that we really love each other... I'm her biggest fan and she's my biggest fan. You know, that's what it's all about really."