That's true. I'm quite open to Clark and Lana myself (though let's never discuss the Chuck Austen run)
The "romance" were several imaginary tales (one of which ends with them divorcing) and there was one date in pre-flashpoint, and while there was an attraction, Clark did his best to put Lois first. Diana didn't have Steve
at the time so DC kept forcing her connection to Clark on to the reader. The DCAU side-stepped that and had her flirt with Batman instead, and I think a lot more people watched the DCAU than they paid attention to comics. Add in Diana and Bruce's connections in the DCEU movies and you have a pretty prolific relationship.
Kingdom Come is an elseworlds, and it's ending only really happens because Lois was murdered. While they grow closer in it, Clark and Diana are actually at odds for most of that story and it's only when things quiet down do they mesh together...and even that, at the end, Clark is ordering the food Lois usually cooked for him, so you know a part of him will always put her first.
I frankly think being connected to Clark brings out the worst in Diana, that was especially true during their friendship in the pre-flashpoint days. I used to be a big fan of it, but once I re-read some stuff with them interacting from that phase I realised just how inappropriate Diana was being most of the time in the name of that "friendship", she was pining for a married man. I love Diana and I feel she would never do something as selfish as that.
I would never dream of telling you what to think, you do you, hell my preferred endings still give you wiggle room for something to happen with Clark and Diana