Emotionally Focused Therapy (EFT)
Emotionally Focused Therapy is an evidence-based model for couples therapy that originally was developed by Dr. Sue Johnson from Canada. It focuses on attachment theory and aims at creating a more secure bond and develop more trust.
If you would like to know more about EFT as a couples therapy, I recommend the book 'hold me tight' by Dr. Sue Johnson. This book is written for couples and can be read together. You can find practical exercises that you can use together with your partner.