The lack of mindfulness in you or your partner may lead to serious relationship issues over the course of time. Sometimes the relationship between two people gets tense. This is normal. But if you don’t work toward easing the tension, finding what causes it, and practicing togetherness and compassion instead, things won’t get any better.
With this said, even if you are at a great place in your relationship, every relationship implies an ongoing process of learning and evolving as a person. You can certainly practice mindfulness on your own. But doing it with your partner is a way to improve mutual understanding, appreciation, intimacy, and ultimately, your relationship.