You can try looking for them in book stores like B.A.M, 2nd and Charles things like that. There’s also websites like SuBLime!
otakumangalounge has a pretty wide selection, as well as indigo, barnes and nobles, and amazon :)
Which country are you from?
In Germany I just buy them regularly in the book store or from Amazon or directly from the publishers etc.. I know the publishers here and follow them on social media, so I know when they bring out sth new :). These past years yaoi has gotten really popular in Germany ヾ(❀╹◡╹)ﾉ~, so I can just buy my favorites and put them onto my shelfs.
Arigato all of you...for the repliesヾ(☆▽☆)
Hey guys do u know where I can buy bl mangas officially.... Im talking about manga not manhwa(webtoon)