I would understand this kind of logic if the uke actually confessed and got rejected by seme. But... why look for someone else and try to 'get over' if you didn't even convey your feelings? Why force yourself to go out with a person you don't love just for the sake of 'getting over'? If you truly love someone your feelings won't change that easily and dating one person while loving another is a rather irresponsible move. Moreover, it's quite obvious that they'll end up together anyway. According to usual BL routes, uke going out with someone else would mean breaking up with this person and hurting their feelings or more extreme version, where ex boyfriend becomes a vengeful stalker and uke has to be protected by seme...
i hate when the seme is a fuckboy, not because he likes to sleep around, but because the author always makes it seem like the uke wants to get over the seme but instead the uke continues to fawn over them not even attempting to get over or like someone else, all while the seme continues to sleep around. can we have one story where the uke actually dates someone else even for a little bit