Dealing with Anger?

Hello there, people under the rainbow umbrella!Today, my mother and I got into an argument yet again, but this time I noticed something. I noticed that I was being really antagonistic, defensive, acussatory (being a a-hole generally), and I knew then that this stems from my anger towards the wrong treatment my mother gave me in the past just because I was gay. I know that we should keep spreading love, especially as people who fights for it, but my anger towards her is keeping me from doing that.Has anyone of you found themselves in a similar situation? If so how did you overcame it? Any advice for dealing with anger caused by mistreatment that you'll never get an apology for?