Vulnerability, shame and loneliness.
Here is a link to an abolutely brillient TED talk by Brene Brown on this topic.
https://www.ted.com/talks/brene_brown_the_power_of_vulnerability
Jealousy in relationships
We all have established vulnerabilities that result from our life experiences. Jealously could be more about your vulnerabilities than your partner's behaviour. Couples therapy can help both parties to understand, accept and deal with the vulnerabilities in a compassionate way. For more on this, visit the Gottmann Institute blog: https://www.gottman.com/blog/why-do-we-get-jealous-in-relationships/
UKCP
The United Council for Psychotherapy is a regulating and accredditing body for psychotherapist.
It includes a 'find a therapist page'; https://www.psychotherapy.org.uk/