Is it normal that I get angry at my boyfriend so easily?

I have also been the victim of a lot of bullying and I can relate to you. In my case, I am not very angry, I constantly feel like I am inferior to others and I battle this feeling everyday.
Here is some advice from someone who can understand how you feel. There is no solution for an overnight "fix". What you will have to do is constantly tell yourself to move on. You have to start small. If here are little things that your boyfriend does that make you mad, then you have to ignore it. Even if that means forcing yourself, leaving the room, etc.
It is going to be hard because both of our problems are something that is now engraved into our personality. It might even take years to change how you react to things, but if you want to see results then this is how it has to be done.
I am still in the process of trying to become more confident in myself, but its hard. It is something that I have to remind myself about everyday. I have a significant other as well, so I really need to try hard. If anything happens and she really needs me, then I need to be confident so I that I can protect her.
I just hope you read this and understand what I am trying to say because I really don't have a way with words. Just try to keep everything in control everyday. Don't let it bring stress into your relationship and be strong.