There is a direct correlation between relationship conflict and negative emotions. We were designed for love and intimacy. Sadly, many of us were not given healthy forms of love. So we enter relationships with baggage full of skewed love systems and unmet needs expecting the other person to meet our emotional needs. However, since unhealthy people tend to attract unhealthy individuals into their lives who enter the relationship with their own emotional baggage - unmet needs and skewed forms of love expecting us to love them as they think they should be loved - it's a great recipe for emotional pain and conflict. People enter relationships with all kinds of learned negative patterns of behavior for dealing with relationship conflict.
The truth is we will never be able to enjoy healthy mutually satisfying relationships until we deal with the issues of our own heart. When we can identify the cause of our emotional pain, we can then process the effects they have on our life, and we can stop blaming others, take ownership of our negative feelings and behaviors and stop allowing others to control our emotions.
People are not responsible for the way they make us feel. Understanding and accepting this enables us to let others off the hook and give them permission to take ownership of their feelings and stop blaming us for how they feel. Jesus heals and restores one heart at a time.