The biological need to bond with others is referred to as Attachment Theory. Experiences in early relationships create a blueprint that informs the sense of safety and security you bring to adult relationships.
Insecurities that have been carried through life can wreak havoc for a couple if these issues are not resolved.
Contemporary research shows that these early childhood experiences repeat themselves in adult relationships in the way we interact and in what we expect from our significant other.
With this understanding and the discoveries of modern brain science on brain plasticity, we have the opportunity to change destructive relationship patterns into constructive behaviours.
Using attachment theory in both individual and couples therapy we can work to increase your capacity for self-regulation, and you can learn to tolerate emotions that you couldn't before. This can lead to better, more profound, and longer-lasting adult relationships.
The links below will take you to relevant blog posts I have written:
Psychological Scars: Time Itself Does Not Heal All Wounds