I think the main thing is to relearn your response to it, so that your CNS becomes indifferent. That way, overtime, the perception and reaction part of the equation change, and it's very possible to reach a stage where it has no negative effect at on you at all. Ways of achieving this include: living your life, giving yourself goals, taking up new hobbies, breaking old routines, doing things that scare you, but are exciting, exercising, eating better, etc
It takes time and you can't rush it.