I think you should say just what you've mentioned here: "I repress my emotions. I am scared of my emotions". Saying this or writing it down and sharing it with your therapist. It's what I've done several times when I couldn't let the words pass my lips for the anxiety I experienced. In time I felt safer to share out right and it got easier. I still get nervous, but my therapists have always responded with trying to help me figure it all out.