If you felt hurt by a friend, would you forgive and forget, or say "good riddance?"?

I had a roommate who I lived with for 2 years (I didn’t know her before living together). We became very close and shared everything together.

As often happens in roommate situations, though, over time we started to have some problems. She got mad about things that I thought didn’t matter, and after a couple conversations I felt so attacked by her that I moved out.

We haven’t spoken since, but we still run in the same social circles. I alternate between feeling like she was so awful to me that she doesn’t deserve my friendship, and genuinely missing her as a friend.

What would you do? Leave things alone and never speak to her again? Or extend an olive branch?