There comes a point in your life when you realize: Who matters, Who never did, Who won't anymore... And who always will.. So, don't worry about people from your past , there's a reason why they didn't make it to your future..
Empathy is the capacity to recognise or understand another's state of mind or emotion. It is often characterized as the ability to "put oneself into another's shoes", or to in some way experience the outlook or emotions of another being within oneself. It may be described metaphorically as an emotional kind of resonance or mirroring.