Miscommunicate. Not clearly understanding another person, jumping to conclusions or mind reading can all hurt a good relationship. ADD adults should take time to really listen) and clarify the things other people say. Don't react to what you think someone means, ask him what he mean and then formulate a response.
Show a lack of empathy. Many people—with ADHD and without—lack the knowledge or desire to understand things from another person's point of view. This self-centeredness destroys the critical balance that's needed for closeness and an intimate bond to develop. Talk with your partner and acknowledge that the ADHD brain) works differently. Strategize how you can work together to understand the other person’s point of view.
Avoid conflict. Whenever you give in to another person to avoid a fight, you give away a little of your power. If you do this repeatedly, you'll start to resent the relationship. Attention deficit adults need to stick up for what they know is right-- it will be better for the relationship.