Confidence is not 'they will like me'. Confidence is 'I'll be fine if they don't'.
孔子说:“譬如堆山,还差一筐,没堆成就停了,功亏一篑是自己造成的;譬如填坑,只倒一筐,继续填下去,坚持不懈是自己决定的。”