I think it's helpful to learn how to manage it and express it. Then you can resolve the issue and move on without the problem building up. I have a hard time with anger, too, but if you can have a disagreement and figure it out, that's a much healthier relationship than if you just blow everything up, maybe over something small.

Maybe try to think about anger as a reaction to something else--like were you not getting what you were hoping for, or something else was uncomfortable, or you didn't feel understood... what was making you angry? That's important to know because that tells you what you want and maybe need. And I think it's less scary that way.