Can't quite remember the name! Feel like it had "love/hate" or "punch" or "drunk" in the name, I know it's NOT "Love or Hate" and it's NOT "Punch Drunk Love".

Plot:
Main character is a college student that's been pining after a (mostly) straight childhood friend that has gone for his military service. He starts up a thing with an office worker but eventually a love triangle ensues. I remember it was nice in that the main character was pretty flawed and the office worker was really patient with him but also found him (understandably) frustrating at time.

In the end

he ends up with the office-worker and not his childhood friend. It was a manwha that actually let the under-dog win and I remember it seemed a little unexpected but was done really well.

Art was good too!

I finally found it! (I think)

Hate Mate
https://www.mangaupdates.com/series/fcjykic/how-to-hate-mate

Thanks for updating your search!
This gives more To Be Read titles to add to my list. 👍😸

T A P A S has complete first season with side stories
and has second season 0-13 ongoing (paid, of course)
Season 2 Episode 14 is to be released 2023-12-28
Thank you again for bringing this title to my attention. 😸

"No matter where you go, there you are."
Buckaroo Banzai