The community here is generally pretty supportive and understanding so you shouldn't have an issues with people being dismissive

You have just as much right to your feelings as anyone else. I bet these other people don't censor themselves around you. Just because the people around you make you feel like you are are somehow abnormal for experiencing them or expressing them because of their own bevy of issues. You shouldn't have to do this, especially at the risk of your physical health. Some people in your life are just toxic so you have to distance yourself emotionally and/or physically from them. For everyone else, it starts small. See if you can practice expressing yourself to "safer" people or express btw of yourself a bit at a time.

I've had similar issues and still do to an extent but you have to push yourself to do it and eventually you won't care as much about how others will react.