This is a very common cause of anxiety in relationships. This could be the result of infidelity, or when one partner feels like they can no longer rely on the other person, from blowing off plans to just not following through on promises.
Your anxiety may not start because of any existing issues, but it can lead to distress and other issues if it persists. But you can take steps to help yourself feel better, get healthy reassurance, and stop relationship anxiety from causing any issues.
What are some of the most common causes of relationship anxiety? The roots of relationship anxiety are often past experiences, personal insecurities, and unresolved issues. It can stem from past traumas, attachment styles formed in childhood, and feelings of low self-worth.

What causes relationship anxiety?Find a solid therapist. Help from a therapist can provide professional guidance that addresses the root causes of your relationship anxiety and coping skills to manage the symptoms you might be experiencing, says Dr. Bowles.
Every relationship is unique, so identifying the underlying causes of relationship anxiety can be tricky. With a little quiet soul searching, you might see that the worry and doubt are rooted in a few different reasons. Here are some common ones

Relationship anxiety is not a diagnosis, but it can still cause distress and distance in relationships. It undermines the trust in your relationship and can lead to self-sabotaging behaviors, ultimately becoming a self-fulfilling prophecy.
While various causes can start anxiety in relationships, it often stems from a struggle with feelings of inadequacy, making a person constantly seek reassurance from others. This cycle of anxiety and avoidance can unintentionally damage the connections they want to protect.

Anxiety and relationship problems occur together. Read how anxiety causes thoughts, emotions, and behaviors that lead to anger, jealousy, and paranoia.