1. They are able to release the past without allowing it to define their current relationship.
Breakups happen. And sometimes they suck. But the most important thing is to realize they don't have to define you and your relationships going forward. People who are great at relationships have been able to wish their past lover well and move on. When things come up in their new relationship, they are conscious that this person is not the same as their ex, and they treat the situation fairly without placing past blame onto it.
2. They understand the balance of give and take.
They know that any solid relationship has an equal balance of give and take. For a long time, I had trouble giving much of myself. I expected to receive from my partner, but thought that if I gave too much, I'd get exploited or hurt. My husband now, on the other hand, was the opposite. In his past relationships he did nothing but give, hoping to win over love and not feeling worthy of receiving. Maybe this is why we were drawn towards one another, but are conscious of this challenge and make an effort to have give and take.
3. They know when they need some space.
Some people disappear when they enter into their relationship. I'm sure you know a person like this or maybe you've been there yourself. They enter a relationship and stop hanging out with friends, family or doing things they love. I've been there. But here's the thing, a healthy relationship requires space between the togetherness. It's OK to do something by yourself to recharge your batteries. Just make sure you give your partner the same freedom.
4. They learn how to communicate authentically.
Authentic communication is a skill that needs to be practiced, over and over again. It may not come easily to people who never felt heard as a child or are afraid to speak up for themselves and say how they really feel. The key to authentic communication is creating a safe, loving environment within your relationship where you can both feel heard. Saying what you need to say can be scary, but not nearly as scary as bottling everything up.
5. They discover their partner's love language and use it regularly.
Have you read the book The Five Love Languages by Gary Chapman? I highly recommend it for anyone who wants to improve their relationships. Basically, he argues that there are five primary love languages: Words of Affirmation, Physical Touch, Quality Time, Acts of Service and Gift Giving. When you understand your primary language and that of your partner, you can make sure you're both getting your needs met.