Is this normal?

I recently walked away from someone and I am battling a range of emotions. I feel hurt because of how they treated me, I feel sad and also happy at the same time, I feel strong and I also miss them and sometimes I want him back in my life. It's almost as if I have a hole in my heart and it is closing slowly and then at any given moment it opens up. It's so confusing!

I always thought that when you walk away from someone that it would have been easy and you'd be happy. I've seen women post on here on happy they are as soon as they've done it. So why don't I feel like that? To the women that walked away from someone, how did you feel? And how long did it take to get over them?