I also ship them, although the way I see imagine it for this AU, when they were both younger and in college they had mutual interest but both of them felt a lot of societal pressure to be “normal.” Lucius in particular already had to deal with the daily stress and pressure of racism, and the idea of being ostracized/attacked if he was discovered to be some kind of queer on top of that was too much. I think they did have several times where their “guys being guys horsing around” stuff blurred some lines and made them feel confused/guilty after the fact. Because both of them were raised with the idea that Boys Shouldn’t Talk About Feelings, they had a really hard time expressing/talking about this attraction to each other and so it led to a lot of awkwardness and miscommunications. (and sometimes, badly hurt feelings that they did their best not to show.)
I’m sure they had some times they both got too drunk to care and were more open and/or got physically intimate, but felt ashamed of it afterwards, and didn’t know how to talk about it/pretended not to remember. Eventually Lucius made it clear he just wasn’t comfortable with being anything more than platonic best friends.
(Incidentally, I think “bowling nights” started when Gail was living with them and Helen came to visit. Helen was feeling a bit insecure about Bob at the time, so she’d make sure to be all over Gail until the boys felt way too awkward to stay home, so they needed somewhere to escape to. 😂)
I do think there’s a chance now for Bob and Lucius to try blurring the lines of friendship again, being older and wiser and having a much more supportive network of family and friends than they used to. ;D