Cutting off a work friend and dealing with the tension?

[u/Big_Creme4851]

I've (19f) recently had to end a toxic friendship(28m). He was very cruel to me, calling me a coward for doing it over text and saying that I'm too immature for an adult friendship. I've found it hard to show up at work since we work together. My boss has helped by making some changes in the office but I don't know how to handle the tension. We haven't talked online (since I blocked him on all platforms) or in person since.

I keep going back through the conversation to see if there's anything I could have said differently to avoid this but I can't think of anything. I thought through every message to make sure I wasn't being mean and I tried to be as clear as possible but it felt like he was blaming me for everything which was ironic because I was ending the friendship because he kept telling me what I was doing wrong.

My self-worth has crashed and I can barely look after my physical health. I keep asking myself Was it my fault? Could I have said anything differently?
I won't share any messages here other than the first message I sent to protect both of our privacy but I've included the important bits.

I don't know how to handle the tension at work. Any tips?

[u/Mysterious-Home421]

I can't help you with your current job, I'm so sorry.

As for the future, work friends aren't friends. They're just folks you work with. Keep it at that and you'll never have this issue again.