Man. Emotions are weird.
I blocked the guy I had a relationship with over a week ago. We loved, it was vivid and fun and passionate, and it fell apart. We tried to remain friends, and finally I had to block him.
I'm happier. Less self-destructive, less day-to-day stress, but I'm so used to his input and his company and it's hard to rewire my brain to carry on without thinking about him. He crosses my mind at least once every ten minutes, minimum.
I blocked him so we both could move on and heal and carry on our lives. It's hard to stick to my guns.