I feel this and the OP. I hate showing emotions in certain situations - like at work with a demented boss. It’s only happened a few times - but all those times were so embarrassing and I tried so hard to fake no emotion but I broke. I wish I had an answer. When I feel the tears coming I try and grit my teeth and imagine my face going blank and try to think of something to pull myself out of my own head or the current moment … if that makes any sense. Like something I’m going to do tonight or saying the alphabet backwards in my head even for just a few seconds. I don’t know - but I’ll be following to see what other people suggest. I agree you shouldn’t try to lose your emotions but I do understand wanting to control what people see. Especially when it will make life hard or have a negative effect on the situation.