You're a part of Regina's past, something she'd rather forget. It's not because she doesn't like you — the opposite, if anything. She still loves you, but she pushed you away years ago, she hurt you, and regrets it every day. When you come to Storybrooke, she's reluctant to meet you, but Henry convinces her to face you after all these years and make up for her mistakes.

❝Regina. It's been a long time.❞

❝Yes— and I'm here to apologize for that.❞