Why is he ignoring me after breakup?

It depends on many things. Some people ignore their ex's after a break up because they don't want to get hurt while getting in touch with them or want to distance themselves so it doesn't hurt that much. Others ignore because they are no longer interested in maintaining a friendship or even a cordial relationship with said person. It's not easy to understand the reasons behind some people's actions because everyone is different at their own way. But if he's ignoring you maybe you should do your best to move on and only focus on yourself so you don't get hurt. And that's my opinion.

He most likely wants to have some time to himself for a while. When you break up, you end the relationship; you begin to live separately again. It is absolutely true that break ups are different for every couple just so much as it is different how each individual deals with the break up, and maybe this is his way of coping with it.

Sometimes space is the best healer. When I broke up with my boyfriend, even though I still cared about him and wanted to see him, I knew that talking or meeting up would either lead him on so that he felt we might get back together or make me feel sorry and decide to have another go even though I know that's not what I want. Being ignored isn't a sign that he's stopped caring altogether it could be because he needs to get over you .

Guys are less emotional than women and I have been ignored after a break up before so I understand that. Men take a while to miss someone. He's ignoring you because he is trying to cover up his feelings. Or at least that's how I see it.

He may be hurting. He may feel guilty about breaking up with you, or upset if you broke up with him. There are a myriad of reasons, but if he cares about you, he will talk to you at some point in the future. Sometimes after time passes, feelings get cleared up and both of you will be in a better state to talk, discuss and gain closure. Just give him that time to process.

After a breakup it is very important for people to have 'healing time', it could be that he is hurt that the relationship has ended and it is very normal for the partner to ignore the other after a breakup as they think it will make the feel better

It is common when people hurt one another to try to avoid their problems. People like this most likely want to avoid further conflict that will result in being hurt. We tend to avoid those that cause unpleasant memories and that is what he is trying to do. It is okay to take some time away from this person until you feel better.

Sometimes, after a breakup, your S/O needs space. If you both mutually agreed to stay friends, it might take some time before they can feel comfortable with talking you again. You should respect his boundaries before contacting them again, and give them time to breathe, and to heal, as breakups aren't always easy :)

This could be due to different reasons. For instance, he could be hurt and needs some time to heal and recover from the breakup. He could be angry and needs some time to process the situation.

It's probably because after a breakup, people may feel withdrawn or awkward, not that he doesn't like you anymore. Maybe he's just trying to put things in the past and not feel awkward when he's around you. Time heals everything and he'll probably come around after a while.