Emotional regulation is one of the key areas in the research of emotions. In order to fully understand it, it is necessary to take into account its relational and interpersonal importance, especially in the context of romantic couples. The purpose of this paper is to examine the similarities between two strategies of emotional regulation (cognitive re-appraisal and suppression) between couples, as well as their effects on perceived relationship satisfaction among a sample of 205 couples that have been dating for at least a year. The participants completed the Emotional Regulation Questionnaire (ERQ) and Inventory of Perceived Relationship Quality Components (PRQC). Two additional hypotheses, initial assortment vs. convergence, and active assortment vs. social homogamy were also tested. The results confirm assortative mating only for cognitive re-appraisal, which is the result of active and initial pairing. A negative correlation was found between cognitive re-appraisal of women and suppression of men, which points to the interpersonal function of emotional regulation, especially in the context of romantic couples. Both actor effects were obtained for cognitive re-appraisal, i.e. the use of cognitive re-appraisal by women and men has positive effects on their own satisfaction with the relationship. In the case of supression, a negative actor effect was established only in the case of women, but not men who suppress statistically significantly more than women do. Partner effects were not confirmed, so the use of a particular strategy has no effects on the partner's satisfaction, which emphasizes the importance of the intrapersonal component of each strategy in relation to relationship satisfaction. Possible reasons for such findings and future implications were also discussed.