Joey Lucas noticing Donna's feelings for Josh

My husband and I watched Donna's "wouldn't stop for red lights scene" in season 2 tonight. It made me think of when Joey Lucas tells Josh that Donna' feelings are starting to show. I don't remember exactly how that is received by him, but I don't think he had much of a reaction. Nothing really comes of it. Josh and Donna continue to banter and flirt like normal. Why isn't it a bigger deal to him at the time? My husband said that Aaron Sorkin didn't want Josh and Donna to get together. I also think Josh wants to maintain the status quo. He likes their relationship as it is - friend, sparring partner, recipient of teachable moments. And he's her boss, so it's not a good look for him to pursue her. They're with each other practically 24/7 anyway. What do you all think?