Boyxboy. I just remember that it was like a best friend sort of romance. One of the guy is sort of a player. He always get with a new girl but that is because he is trying to draw them away from his best friend who is the guy he likes until one day he heard that he is gay.
http://www.mangago.zone/read-manga/bukiyo_na_bokura_no_sukima/nbt/5d735862d6235f4c/Vol1_Ch1/
It sounds like this one too~
I'm pretty sure it's a boyxboy. I remember that it was about a boy, I'm not sure, I think he has glasses maybe. He is quite popular and also turns down confessions from anyone. He has a best friend who he likes. His best friends starts getting close to this girl. He gets jealous. When the girl came to see his best friend, instead he said some stuff that made the girl cry. His best friend comes and sees this and told him to apologize but he also started crying. (if ya'll know something sort of similar to this, please help me out.)
http://www.mangago.zone/read-manga/miraiken_de_ai_o_tsumugeba/
Your a looking for the second story from this manga! (⌒▽⌒)
http://www.mangago.zone/read-manga/miraiken_de_ai_o_tsumugeba/
I starts from chapter 3. This manga is similar to what you are searching for. (=・ω・=)
You can see the preview of ch 5 & 6.
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https://www.cmoa.jp/title/184996/vol/6/
You can also purchase ebook here.