By the time he came to her for advice, he could honestly say he trusted her more than anyone else in his life. She was honest, she was caring. She stayed loyal to her code, something he admired and understood. He was a little nervous that their relationship would lose that teasing element he enjoyed so much. He liked startling her, and hearing her surprisingly husky laugh, and of course, she was very easy on the eyes, especially when she looked playfully up at him with those big brown eyes. He didn't want to risk that, but he really needed help. In fact, as she pointed out, what he needed was a friend, and he realized that she was his friend now. That meant a lot to him.
When she asked him if he was still in love with Gabrielle, he didn't answer. The answer was yes, he thought, but her question made him think about what exactly love meant in this case. If it meant carrying a torch for a woman for years, always being there for her, then yes, he was still in love. But if it meant enjoying her company above all others, he wasn't so sure. All other things being equal, he'd probably have more fun talking with Dr. Dani than spending an evening with Gabrielle. Of course, all other things were most definitely NOT equal.
When he found out Gabrielle had been letting him think that Juliette was his child, his reaction was strange. He knew he should be furious and devastated, but in reality, he was relieved - now he was finally done with her. She wasn't a good person, and she wasn't good for him.