Little Chitoge is so precious... And such a good friend. She still is. She wants to support Kosaki. She really is best girl.
But I know, in the present, Kosaki doesn't want Chitoge to give up, either.
Also, everybody, remember that Raku has already decided that the promise back then doesn't matter anymore- he has decided that his feelings now matter most to him. Who he chose then is not necessarily who he has chosen now.
There is a preponderance of plot outside of the promise memories that points its own way.