Inner dialogue:

"....Block him. Seeing him on my feed upsets me." 
Block
"No, girl. I've grown. I know how to regulate my unhealthy emotions. "
Unblock
"Yeah, but why would I expose myself to a known trigger?"
Block
"Yeah, but he might get offended that I blocked him."
Unblock
"Bro, he's moved on he doesn't care...." 
Block
Rinse and repeat.