Build. Build a foundation of appreciation and respect. Focus on all the considerate things your partner says and does. Happy couples make a point of noticing even small opportunities to say " thank you " to their partner, rather than focusing on mistakes their partner has made.
Explore. Explore each other' s interests so that you have a long list of things to enjoy together. Try new things together to expand mutual interests.
Establish. Establish a pattern of apologizing if you make a mistake or hurt your partner's feelings. Saying " I'm sorry" may be hard in the moment, but it goes a long way towards healing a rift in a relationship. Your partner will trust you more if he or she knows that you will take responsibility for your words and actions.