Oh great...
Two people are in love.
Third one barges in and wants person 1 as well, so he tells person 2 that he and person 1 have hugged and kissed, so naturally person 2 is pissed as hell. Because person 2 thinks person 1 is in love with person 3, he probably wants to give up on person 1 and when he's been asked what he thinks of person 1, he lies and says he doesn't like her.
Well, truth to be told, I can understand Makito. Not only is he in love with a highschool girl, but she's also his employer, he doesn't know she loves him too AND Mr. Perfect has just popped out of nowhere telling him lies that make him believe she's in love with Ryan.
Of course, what he said was terrible and now Yui is badly hurt, but considering the situation, I think it's Makito who's suffering the most ... by far.