Celebrities might have wealth and notoriety, but they're just like us, in that they, too, often get into toxic relationships.

Meghan Markle's friends all warned her not to get involved with Prince Harry. She ignored them – but there are plenty of royal red flags that we can't ignore.

While we’re often quick to identify red flags in romantic relationships—those behaviors that make us feel uneasy—it’s not always as easy to recognize when a friendship is going sour.