Narcissistic individuals have insecure attachment issues. They will reach out when “they” need something but shut you out when you have needs. They are more apt to have temper tantrums and will lie about what they can actually do. They tend to exaggerate and have an entitled character. Many do develop addictions due to their ongoing deep insecurities.

You cannot fix them no matter how much you care. They like to blame others for their insecurities and often like to practice this anger and blame with others. You will always feel you are not good enough and the relationship problems are your fault. This crazy feeling you describe is typical of those in relationships with individuals that have attachment issues.