The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

It doesn't even matter.
I'm HAPPILY married.
The Big Bang Theory Season 12, Episode 21

It's kind of weird how grown up he is now.
Happily married, throwing dinner parties.
The Big Bang Theory Season 6, Episode 19

And we lived HAPPILY ever after.
The Big Bang Theory Season 10, Episode 21

I have many guards who'd
HAPPILY imprison him or behead him
Game of Thrones Season 7, Episode 6

...well, then I will HAPPILY catch them with
the reproductive sac on my upper flermin.
The Big Bang Theory Season 8, Episode 8