If you need couples therapy, you need a couples therapist. Doing worksheets may be helpful--but could make tensions flare. Proceed with caution. Here, from the Training Institute for Emotionally Focused Therapy (TRI-EFT) is a page of EFT assessments and worksheets that may be of interest either way.
For a full book of similar material, focused primarily on how lifelong attachment patterns play out in romantic partnerships, consider An Emotionally Focused Workbook for Couples: The Two of Us.
And, if you're a therapist looking for a primer on EFT but don't have a full book's-worth of reading in you, here's a PowerPoint walkthrough from an Evolution of Psychotherapy conference.