It's not something that most people truly understand, and Ron knows that. The idea of their Saviour with a Death Eater is not something that they can bear.
But what he has never understood is why people think he should be the most vociferous opponent to their romance. Of course, when he first found out, he had been just as horrified as the rest of the wizarding public. He had spent a good part of his school years imagining Harry as the official member of Ron's family he would be after he married Ginny. When he found out Harry was gay, Ginny became Charlie in his head.
So yeah, he hadn't planned on watching his best mate fall in love with the Ferret.
None of that, however, meant he was unable to accept it. It was undeniable to anyone with eyes just how happy Harry was with Mal – Draco. What people never realized was that all he had ever wanted for his friend was his happiness, and he wasn't about to interfere with that just because he was dating a Malfoy.
For:
Alphabet Soup: Drabble Competition - U is for Undeniable
OTP Bootcamp, Prompt 49. Practical
If You Dare Challenge, Prompt 43. Rumourmongering