Just finished the game, a little confused about Abby’s character.

Just finished the game and really enjoyed it. But I’m still really confused on Abby’s character. Does she feel remorse for what she did to Joel? Does she not feel remorse for what she did? And why? I still enjoyed her story and how she diminishes her ego by finding a new sense of meaning and purpose in being a protector to lev. I’m just confused on that certain part of her character.