romantic love appears like a good thing to me, and does not necessarily require alcohol. in cinema, it appears as "alcohol reference". now you know, japanese have a favour for vodka and guiness beer.
excuse me, you are older than me: additional i suggest you read some japanese manga, but sorry: i assume you already did that.
if you say "romantic love affair which includes marriage later on", most people are getting your point. probably you like to point out the aesthetics, specifically of man/woman. the translator writes "sweetheart", and i assume, a guy calls his beloved girl. well, ya if i read "my terrible monster", i assume its the girl, probably.
sorry if what i write does not appear too intellectual. just, if you use the right words, like sweetheart, the information man/woman appears as additional. especially if you draw/include a "romantic" picture.
sorry for reading the MAD MAD over years, and now reading/translating back your post.