What is something you learned about yourself from you last relationship?

I just got out of a long term relationship and I'm in the post-break up reflection stage. So far I've noted that I learned more about the kind of and frequency of attention I need in a relationship. I'm having trouble figuring out any other lessons, but I think there were probably more.

Maybe reading other people's lessons will help me be more reflective. What are some lessons your last relationship taught you about yourself?