I shut down my emotions in high school. When I started therapy at 25 I had forgotten that my body was supposed to have a physical reaction to emotions. When I started thinking about old hurts in therapy my body started waking up, and I was feeling emotions again. Today I can go to feelings from two routes - either thinking about the hurts from then or now, or I start with paying attention to how my body feels and see if an emotion is attached to that body feeling. Good luck - it does get better in time.