There’s something to be said about the “we-ness” of high-quality romantic relationships. When you think of your relationships in a plural sense (e.g., “We've been together for 6 years,” rather than "I've been with him/her for 6 years"), you sometimes start to define who you are (what psychologists call your self-concept) in terms of those relationships. By defining yourself in this way, you include aspects of your romantic partner in your self-concept. For example, you might take on some of your partner's characteristics, or see your partner's interests as your own (think about it – did you actually get into that eccentric rock band because you think they make great music...or was it because your partner liked them first?). In many studies, partners who define themselves in this pluralistic way tend to enjoy greater closeness, more commitment, and greater relationship satisfaction.1,2 In other words, the more you include your partner in your self-concept, the better your relationship is likely to be.
But is it always good when we include our partners in our selves?