i get that chiaki wasnt really in love with his gf and all but they've dated since their m...

i get that chiaki wasnt really in love with his gf and all but they've dated since their middle school years(was it?) and then just ending their relationship after she came all the way to their school festival...i mean it felt like chiaki didnt even felt sorry for developing feelings for someone else but still i like chiaki i was just not satisfied with how he ended things with his ex