There are ways to heal, no matter your age. If you struggle with any of these issues in your relationships, it can help to speak with a qualified therapist. They'll be able to help you determine whether an attachment disorder is the cause of your difficulties and, either way, be able to assist you in creating an action plan to heal.
The key to healing attachment disorder is learning to build self-esteem and self-love from within rather than depending on the feedback of the external world. One of the main goals in treatment for attachment disorder is to establish authentic connections with others and with oneself, based on trust, stability, safety, reciprocity, vulnerability, compassion, and respect.
This can happen through clinical therapy, as well as experiential modalities such as yoga and meditation, art therapy, mixed martial arts, adventure therapy, and EMDR—all of which have been shown to build these healthy connections over time.
Ultimately, inherent worth and self-love must be behaved into rather than talked or thought into. The journey begins with moving away from self-harming behaviors that mask traumas and attachment wounds. Once these underlying causes are brought into their conscious awareness, people begin to heal by learning and practicing new self-affirming behaviors that lead to a change in the way they see themselves, what they deserve, and who they believe themselves to be and to be worthy of.
When we act out of fear, we begin to think out of fear and feel out of fear—and the same can be said for love. It is challenging and arduous, but with the right support and treatment, anyone absolutely can recover from attachment disorders and learn to love themselves.