I can't stand it when people I love yell or are aggressive because it brings back bad memories
What does aggression remind you of?
I remember being always angry and always yelling as a child.
You should talk to a therapist if aggression causes you to relive horrible things. It's okay if you dislike aggression but it should cause a lot of mental problems.
Don't. I'm the one I'm worried about. I don't need therapy.
I feel like if you're worried about yourself, getting help professionally or from your family is a good first step. I think you have anger issues, and it can only be solved if you accept that you have an issue, and if you don't you would end up alienating the people around you and even yourself, so I do hope you find courage to get help.