[It's not so much that he wants to. He still thinks that marriage is unnecessary. Being married or not won't change his and Barry's dynamic at all, won't change the way they feel about one another or how committed they are to each other. But, logically, they kind of are married already, in every way that matters except legally. If the "not legally" part is going to make their lives and Dawn's life harder...well, that makes it a pretty easy decision.

Hal rolls his eyes at Barry's reaction, leaning back in his chair]

Don't act like I just said something ridiculous. If us not being married is gonna make things harder, then whatever. Let's just do it.

[Romantic]