How do you know when a friendship has quietly become toxic?

It doesn't happen all at once — it's a slow drift, a series of small moments where you leave the conversation feeling worse than when it started.

The hardest part is that you love them, you have history with them, and ending a friendship doesn't come with the same script as ending a romance.

Have you ever had to grieve a friendship — how did you know it was time, and did you ever get a clean ending or did it just quietly fade?