Responses
could you be looking for two different mangas? The first half of your description fits this one
http://www.mangago.me/read-manga/shitteru_yo/mf/v01/c001/
I dunno about the second half tho ..
I have been desperately searching for this yaoi manga for the past few hours and I can't find it(/TДT)/
If I remember correctly the seme has an ugly personality but he is always putting up a front of the nice guy with a fake smile and I guess the uke is always glaring at him or something??? I THINK IT GOES LIKE THAT??!
But see I MAINLY remember the part where the uke meets the seme in the hotel because the seme threatenes him that he knows the uke's secret or something?? He has a gay porn video of the uke and another man. Turns out it's not the uke because it's the uke's cousin who looks like him but has a different hair color. So the seme gets down to business and starts looking for moles on the uke's body like the porn actor. In the end turns out that they've known each other before when they were little and the uke has always liked the seme???
So.... PRETTY PLEASE MY DEAR YAOI COMRADES!!! HELP THIS POOR SOUL!!!! ╥﹏╥ ┗( T﹏T )┛