My ex-girlfriend used me for sex. How do I move on from the betrayal?

I told her we’d have to be in a relationship to be lovers again. So we got back together – and two weeks later she ditched me

My last relationship felt like the best sexual relationship I’d ever had. After my marriage ended, exploring intimacy with a new partner with a well-matched libido felt liberating and life-affirming. After a brief split last summer, she reappeared and said she wanted to have sex again but not to resume as a couple. I declined, explaining that intimacy worked for me only in the context of a relationship. She then said she wanted to get back together, so our relationship briefly resumed.

Two weeks later she said she wanted out again, leaving me feeling I had been duped and manipulated. The destruction of trust has eroded much of the confidence I had gained. I have found it impossible to consider starting a new relationship. How do I move on from this feeling and untangle the damage?

Pamela Stephenson Connolly is a US-based psychotherapist who specialises in treating sexual disorders.

If you would like advice from Pamela on sexual matters, send us a brief description of your concerns to private.lives@theguardian.com (please don’t send attachments). Each week, Pamela chooses one problem to answer, which will be published online. She regrets that she cannot enter into personal correspondence. Submissions are subject to our terms and conditions.