This game uses a simulation of texting. There is some delay between texts, but it is mild and the game is short (< 500 words).
In it you play as a classic example of a toxic person in a relationship. Silent treatment, blaming others, pushing others to invest in fantasies you never intend to complete, ignoring people until they're leaving and love bombing them.
It's kind of twisted to see things from the abusive person's viewpoint, but the game does a good job of being authentic to the style of thinking.