A friendship was completely over

What is something that made you realize that a friendship was completely over and could never be healed?

My friend needed a place to stay for a few days. I took her in and to make a long story short, while staying with me she stole $100.00. When I confronted her, she denied it. I told her to get out and never contact me again.

As a teen I had a friend from tennis. Didnt know her very well. We went on 2 holidays together with our parents. She always needed to borrow money and then forgot to give it back, so I borrowed some from her, which she didnt forget and asked back. But I still get loads from you. Oh. Why didnt you just say so? And we made 2 friends on the holiday. Would meet them but I had to study and she never studied and had an easy school, so she got mad. After that I didnt see her anymore. I also quit tennis cause a guy would always yell like Mc Enroe and I was there for my fun.