I’m not good with masking my emotions sometimes, although I do try to process the things before I take any action.
My face and body language on the other hand can reflect what I’m going through at the moment.
Are you aware of any ways to control yourself under difficult situations (apart from things like meditation) ?
You answered your own question in part. After years of practice, the thoughts I have during formal sitting meditation have spilled out into everyday life. I find it easier to let thoughts flow through me, which helps me react much less strongly in moments such as you describe. Meditation is one way to cultivate that kind of relaxation. It’s not even control, but rather repetitive practice and habit.
Trying to control yourself in those situations tends to lead to uneven results, because exercising willpower like that tends to be draining and therefore very sensitive to whatever els is going on for you. If you manage to control yourself, you’ll probably want to get out of the situation as soon as possible in order to recover.
I have found a couple of thoughts helpful:
Repeat. Repeat. Repeat. Calmly. With subtle determination.
Of course, none of these are quick fixes.
Peace.