Trix's Favorite

There was this yaoi manga about two childhood friends who were also classmates. They were quite close until one day the uke starts acting distant towards the seme. The seme doesn't like his behaviour and says something like "i've always been the first to know everything about you like when you first got your pubic hair i was the one to know first and i was the one who first saw you getting yourself off". They got close after that since the reason for the uke's aloofness was that he had feelings for the seme. I don't remember the name of that manga and have been looking for it. If you remember it or come across it pleqse do let me know. Thank you!