A simple gesture assured oneself that you had not spent your life waiting in vain. That's all that's required, isn't it. Having known that while you were thinking of and missing someone, your thoughts were reciprocated.
It helps to know, that we are both staring at the same blue sky.
如果错过了。。。那就不要再去追究。因为当你回到过去时,人事已变,而你想追回的从前,已经离你而去。