It was supposedly a cute movie about love and marriage but I can't stand the message.

So the male lead's almost-an-affair is nothing to be revealed? And it's considered as a normal behavior? I thought it would cause a scene between the main couple.

This man is such a jerk to me, for being over-jealous towards for no clear reason, just him being so childish and possessive, and for taking her as a bad inspiration to write poems, for ignoring her, and worst, for letting his jerks aka so-called friends embarass her and not protecting her.

I really don't think the ending is a happy ending for the female lead. She deserves so much better.