yeah, probably. if theres a woman i love that i know once loved me, before i believe she doesnt anymore, i'd have to hear her say it. if you dont agree with that, then you must have never been head over heels in love with a woman before.
cant fault a man for trying to be with his soul mate.
if he truly believed she really moved on and that she was happy with that, then he would have likely let her be. but he didnt believe that, and he was right! it was pretty obvious that lois wasnt over superman, and it was pretty obvious she was using richard as a sub-par replacement when she was on the rebound.
to make sure she's making the right decisions for the right reasons. rather than making the wrong decisions (richard) for the wrong reasons (out of spite for superman leaving).