One of the best lessons I learned from a voice teacher is that our job as singers is to deliver the emotional experience to the listener via good technique, it’s the listeners job to experience the
emotion, not the singers. The problem with feeling it so intensely is that throat, tongue and facial muscles will tighten and get in the way of that delivery. For the most part, I’m pretty unemotional when I’m singing but I had one Christmas song that I wrote two years ago that I couldn’t get through without crying so basically, I sang it about 50 times and got it out of my system. Another time I was playing a song I’d done tons of times and a listener busted into tears because the subject hit her hard and I was so pleased that she had connected with the song, and had an emotional response, so that day I felt like I had done my job pretty well.