What do you do when you just want to rant your heart out but you fear it might hurt you even more?

I've been pretty good at bottling it all up and showing the resting bitch face 24/7 since I was a child. I kinda just observe and judge and pass all the time without saying a word. And I kinda feel safe that way, but it's getting to a point that I feel I might physically explode. I work like 10 to 12 hours a day, and I have trouble sleeping so I spend my remaining time reading comics and watching shit. And sometimes I don't speak for so long that my throat starts to hurt, and when I do speak it's mostly me talking to my cat in the silly voice. It's like the person inside me is fading away day after day and one day I'll be an empty shell. What would you do if you were me?