Why do guys run when there’s conflict?

I recent have been ghosted after a 2 year relationship. I can’t say we were perfect, we did have arguments. After any argument we had he would disappear for 2-4 days. Expect me to reach out Everytime. I stopped because I found I was apologizing for his behaviors. Once he realized I wasn’t going to apologize he came at me angry a couple times.

Our last fight was over something unnecessary but it escalated to the point where I saw him yell in my face for the first time while he was crying.

I’ve always tried to voice my opinions and concerns to him but I never felt like I got through to him. And he never did the same for me. Eventually everything bottled and I ended up blowing up on him for no reason. I immediately felt horrible and was full of regret.

The more that I think about it was because I was holding in my emotions. Which was not good.

That fight was on Christmas. So it’s been 2 weeks. I’ve already apologized for my behavior and tried to have a conversation with him because I didn’t want this to keep happening I wanted him to understand that our feelings need to be talked about we need to have communication.

He ghosted me after that. Read my texts and gone.

I keep going through emotions these past 2 weeks of regret, feeling unwanted, feeling unheard.

I’ve gone no contact with him to heal since then I can’t let this keep happening I want to have communication in a relationship.

But why do guys find it so easy to just disappear when there’s conflict? Why can’t they admit faults and work on things. I know not all guys do this but I don’t want to go down the same path again with someone else. It was pure torture.