When other people helped you on something, and you said you'll belanja makan next time, do you really mean it?
And when you helped other people and get the same offer/promise in return, will you really look forward for that meal?
BTW, when i tell you ' let's yamcha/meet up when free', most likely it's not going to happen. Cos i like to set my appointment directly ( time & venue ), not just saying it in general. ;p
15 hours ago