I think chiaki likes his girlfriend, but nakamura kurumi is number 1 and his girlfriend is number 2
yeah..he likes her..he would not go out with her if he didn't like her..but Chiaki has this playboy aura..
True he does have that playboy aura but he also seems to be the type to like multiple girls and categorise them into types (for example the tsundere type, the cute type, etc, etc) and numbers like #1 nakamura kurumi #2 he girlfriend (whose name was never mentioned). But it's just my personal opinion you don't have to agree with me.
(๑•ㅂ•)و✧
Would be nice to have a spin off where a girl is after Chiaki and will try her best so Chiaki can forget his feeling for Kurimi..and Chiaki will fall in love again.. ahhh..but 7 years that is long time dude..you need to really move forward and find another girl you will truly love..kind of feel bad with Chiaki's girlfriend because she is not who Chiaki really loves..