^Yes, but they complement each other intellectually and professionally. Their relationship is as friends and partners, as a team. Romance isn't the only way two people can bond. The mentally based, problem-solving synergy they showed in the restaurant scene is a valid kind of relationship in itself, and I wouldn't like to see it treated merely as sublimation for love or lust. And I'm glad that this episode didn't treat it that way. The scene wasn't about them being jealous of each other's dates and really wanting to be together. It was about them being sexually interested in other people but being so caught up in their shared intellectual endeavor and their mutual workaholic nature that it overrode everything else.
Okay, maybe that does mean they couldn't be happy with anyone else, that they're so much on the same page that they're right for each other more than anyone else could be. But that's okay, so long as it comes from their friendship and partnership and shared interests and experiences, rather than just being a formula "They love each other but they're denying it" thing. In other words, I'd prefer to see their professional partnership presented as the basis for a romantic connection rather than being dismissed as merely a smokescreen for it. Because they really do make a good team.