Ok so what I remember: it's about 2 adult guys who are either work colleagues and/ or friends, light-haired dude finds out dark haired dude has been cheating on his wife, and since he's had a long-term unrequited crush on dark haired dude he blackmails him into sleeping with him, so he keeps quiet. And the manga ends with them becoming a couple, but light haired dude breaks up with dark-h-d because he's insecure. After that d-h-d gets a girlfriend, but in the end breaks up with her to get back together with l-h-d again. The whole manga was pretty angsty and I think it's probably pretty old. If this rings a bell pls help me uwuuwu
Edit: I edited a grammar mistake and the answer disappeared Σ(っ°Д °;)っ stupid me. In case fin (I think?) can't see my response, thank you for finding the manga!!
It's a comedy, yaoi, the main lead is thirsting after a delivery guy and always fantasizes that he confesses, never actually does anything though. It's pretty hilarious as far as I can remember
delivery boy debacle?
Unfortunately not but still added it to my list XP thanks though <3
Maybe you can find from the tag? http://www.mangago.zone/tag/delivery%20guy/