In my normal state, I cannot "choose" not to feel something, but on antidepressants it becomes ridiculously easy. Usually the initial feeling will come, but then I'll forget about them. Considering I've been on these meds practically nonstop since I was 12, I think that it has interfered a lot with the development of my personality. When I discontinued them for a short amount of time I had this massive "emotional reflux". I basically went from being an INXP to an overly emotionally, mentally unstable ENFP. I felt sooooo much loss over the amazing people I'd never really given a chance and all the opportunities in life I'd passed up in exchange for good grades in tough AP classes. I went through a period of INTENSE depression and am now back on the nasty pills.