From conveying intimacy (“I like you”) to irritation (“stop messaging me!”) and dissatisfaction (“I don’t think we’ll work out”), language use plays a fundamental yet often overlooked role in the initiation of relationships. In online dating, daters exchange messages to determine how interested they are in a partner and whether they would like to go on a first date with them. In two studies, we examined whether linguistic features present in online dating messages can predict whether a first date took place. In Study 1, we identified five interpersonal processes related to first date outcomes: investment, interdependence, emotional dynamics, decision-making, and coordination. In Study 2, we tested our hypotheses generated from Study 1 on a new dataset. Our results suggest that certain linguistic features within online dating messages can be used to predict above chance the likelihood of going on a first date.