In between insisting that she was, in fact, totally fine, and that everything was probably for the best, she told me that her (now ex-) partner had accused her of cheating. My friend had not, to be ...

With cheating in a relationship, whether physical or emotional, it's typically clear when things have gone too far — but what about your partner seemingly turning up the charm for a friend or ...

What counts as cheating to you? For example, if your partner flirted with someone else, would you consider that to be a form of infidelity? What if they followed or interacted with someone attractive ...

Forbes contributors publish independent expert analyses and insights. I write about relationships, personality, and everyday psychology. Do you ever wonder, “If they were happy, why did they cheat?” ...