like I will always tell people. life is not about competition. when u keep stalking your ex, it only hurts u when, u feel he/she is doing better, or u feel arrogant when u feel u r doing better. But I don't really get your definition of stalk sha, it is inevitable that one will always want to know how his/her ex is faring afterwards.
sometimes I do it too, especially when she actually left a legacy in my heart/life. Not when u r happy or when u feel liberated that u av just broken up.
hope I'm making sense here