I am a New Member at Similar Worlds

I just ended the last relationship with a friend. After just taking and taking from me. The last straw that I paid for two movie tickets, he had the tickets on him and on the day of the movie. I called him, he said he wasn't well. I said we won't go tonight for he wasn't well, so I went to watch a different movie only to find him there with another person with my tickets. I got really angry with it and terminated the friendship. It may seem petty to others but it was hurtful for me