#had adams not kept his feelings closed away maybe keith wouldve have noticed and return them

Mhmhmhmhm... But would this have prevented Keith's murder by Jeffery?

Oh sure Adams revealing his feelings may have resulted in the two possibly getting together, but what about Keith's future murder by an overprotective Jeffery? Would this have been enough to somehow save Keith's life or would Adams have been left devastated? :)

Unfortunately, no. In the end it would not have mattered. If anything, it'd only leave Adams feeling worse than he already did upon finding out what had happened. He blames himself already for not having been there on a shift the night it he incident happened (he worked daytime shifts on the weekend and overnight shifts on weekdays, the murder happened on a weekend evening long after Adams' daytime shift ended*). Had he and Keith miraculously gotten closer than originally, he'd only be left feeling even more shittier for not having been there.