Board Thread:Off Topic/@comment-108.80.32.16-20160803042127/@comment-128.151.150.17-20160913035552

Also want to add that it's not uncommon for a straight male to be uncomfortable with a girl's feelings for him if he's not into that particular girl for whatever reason. Although as far as canon is concerned, Nora herself would deny having feelings for him even if she does, so Ren can't know for sure that she has romantic feelings for him. True, they may have been friends since childhood, but a friendship like that can sometimes be a reason not to want or expect a love relationship, esp if said friendship is almost sibling-like, which is a possibility with Ren and Nora.

Nora may secretly harbor romantic feelings for Ren, but even if Ren does not already reciprocate, that doesn't necessarily make him less than straight. It simply may not be in his character to harbor the same feelings or even any particular strong feelings overall. Calm, serene, collected, none of those normal personality traits should  be used to justify a completely different realm like sexual orientation, whether it's straight, ace, or anything else.