'My ex was always cutting me off at dinner parties. I'd be telling a story and he'd make some stupid pornographic joke to bring the attention back to himself,' laments Gwen*, 29.

'If you're always the supporting actress in his life without any opportunity to take centre stage, ask yourself whether you're okay with that,' advises clinical psychologist, Dr Jared D Von Arx. If not, it's time to have a talk with him - he may not even be conscious of his behaviour. Then, conduct random spot checks to see if he actually listened. While out with friends, tell a joke or a story and see if he jumps in with the punch-line. Or hold back the banter and notice if he tries to draw you into the conversation or happily blabs on without interruption.