You can still express your anger. That does not mean that you shout at people, etc. It means you speak to a close friend about why you're feeling anger. It occurred to me that you're suppressing anger, and the anger is coming out over small, inconsequential things.

You're probably angry about work, angry because women aren't attracted to you, angry because you don't look like others look, etc. Don't actually know. I'm just giving you examples.