Dear Louise: 'I've discovered that not only has my ex been dating someone else, he's been sleeping with this person while also sleeping with me'

Louise O'Neill on toxic relationships.

I’m in my early thirties and have been in what I can now identify as a toxic relationship with my ex. 

We broke up a number of years ago but never truly broke up. I moved out of the home we shared, we decided we'd remain 'friends', and lo and behold, we started getting on better than ever. We continued sleeping together regularly, going on trips away, dates, etc.