Hmm, such a good question *like a lecturer*
I think, it is not. You can dislike him, but you can’t ignore him.
You must have your own “ME TIME” just to relax and introspect about what’s went wrong, what’s going on and also what would you do next.
The only thing that you need is time. Just do your own work, find your happiness and let him go.
It is much better than trying to erase him from your head and trying to dislike him or trying to ignore him.
It won’t work, trust me.