I’m 5’9, 155 pounds. Work out regularly, do some boxing as well. Recently, my neighbor upstairs has been stomping the floor making my ceiling shake and I can hear him yelling at whoever he lives with. Dude has anger issues and sounds abusive. I go up to confront him about it and the dude opens the door and gets in my face about how he’s just “disciplining” his girl. For context, he was a few inches taller than me and similar athletic body type. His aggression towards me got me acting like a pussy. Lost my masculine frame, had to cross my arms and keep a slight bend in my knees because I could feel myself shaking and didn’t want him to see that. How the fuck do I handle confrontation better? I work out, eat right, do boxing, but the moment another guy gets in my face, my fight or flight gets activated and I pussy out.