Why do some people choose to block out emotions?

It sounds like the stages of depression to be honest... You can't feel pain any more, I had some thing along the lines of that, I was always happy like 24/7 but inside it felt like i was caving. I took anti depressants for 7 months than I was back on my feet, I'm not properly diagnosing you though. Probaly best to go to a Therapist about it. Hope I help!