Could we actually see Walter and Paige confess their feelings for each other?

In the case of the former, the answer was a clear “yes” since that became clear at around the halfway point of the episode. The character was accidentally sent into space, and upon arriving there, issues arose to the point where he could no longer breathe. As he lost oxygen, he slipped more and more into a haze, and more and more of his feelings towards Paige came out. While the entire team minus her and Tim was listening, he basically made all of his feelings clear while he had an impromptu dance with her, complete with James Bond tux and stylish moves. This was sweet in a way, but then hilarious in another since you could see how queasy it was making everyone else.