Design for Life: I think my partner is seeing someone else – what should I do?

This week, psychotherapist Siobhán Murray advises a reader who is experiencing communication problems in her relationship

The loss of a boyfriend’s house keys triggered doubts in one reader’s mind about the state of her relationship. Illustration: Getty

Dear Expert,

I’ve been with my partner for two years. About a year ago, he gave me the keys to his apartment so I could let myself in at any time. I still only go there maybe two nights a week, because he’s often too busy with work to see me.

We went to the cinema recently and my wallet got stolen. I couldn’t understand this, because I was sure it was in my bag. ...