think marriage is for better for worse and you should nit throw away what you have yet.
In this situation you have to consider a few things.
1 you are both living apart: distance confuses things and makes people grow apart. It takes a lot of discipline to manage a distant relationship. That means that yoy people are not operating on a normal playing field. Every little thing is warped and uncertain.
2. You have a Child together. It is worth it to give your marriage a try to preserve that family unit. Don't walk away now when things are not natural. consider the pressure distance is putting on you both.
His temper is not a death sentence (as long as he is not violent towards you). You should both work together and learn to manage it. As his right hand and helper you should suggest exercises to practice like counting 1-10 when he is getting upset. Walking out of the room during an argument. It also means you need to learn how not to incite him and what his triggers are. You will not be able to communicate with him like every other wife so font be listening ti other married people or friends. you must learn how to handle a man with a temper. Its 2017, There is research out there, online forums you can join to get tips and advice, groups in canada he can even join self.
Nor be today men and women started marrying spouses with hot temper.
In terms of apology after fight that's something you should train him to do. That's left for pillow talk and bottom power. Appeal to his soft spot after a fight.
Finally ask yourself am I leaving because if his temper oR their is someone out there I like??? Remember the grass is greener where you water it.