Why do Guys do this?

Ok I’m new to this and have no support. I ask for proper words to help me heal. Please don’t say move on because I have already broke up with him.

I just can’t seem to stop thinking why it happened this way. I feel like if I know why he did what he did I’ll have that internal peace/ closure.

Ex would not contact me for days after argument. I feel bad because now that I think about it maybe I should have reached out too and put my part. One time he ignored me for a whole week and I told him I would dump him if he went that long. He did it again and again. I texted him….I think I only did that once or twice where I was angry he was ignoring me. It just made the situation worse. I was getting fed up. I no longer insisted.

He did it over and over. He was the one coming and begging when he saw I didn’t text … Eventually it led to me blocking him. He went as far as not talking to me for 2 weeks. Blocking me offf and on …on social media. I’ve read similar threads on here but can’t seem to understand why.

I feel like if I get to understand why I’ll be able to stop dwelling on it. I rather know that he was talking to other females so I can literally hate him but I can’t.

Anyone went through this and later found why they disappear