How would you give an mature response on someone disregarding your feelings and making it about themselves?

I’d choose someone else to confide in, personally. When I’m going through something I don’t a f to have to explain common decency to someone too.

For you: yes, everyone goes through something, and it doesn’t make it any less valid of what you’re currently going through. Life is hard. I’m sorry if you’re having a rough time right now. Practice some self care if you can and relax as much as possible!