I think it ended too abruptly, like we didn't get to enjoy the love on his side? previously we saw him getting close to FL but it still felt like "a dear friend" rather than a "ILY" kind of closeness. And then the last chapter he jumped from saying he loves his childhood friend still to rejecting her to running after her then to being confused when she asked him if he liked her and then straight to confess he likes her... that was really all over the place (⊙…⊙ )
Maybe the series got axed and the author had to speed run things?