This person that you have become and are becoming: this is the person that they love. No one is a stagnant being; we all evolve and change depending on our motivations and desires. You're doing something amazing: you're trying to be someone better than the person who did terrible things. You're doing it for them, and I'm certain this isn't lost on the person you love. It takes phenomenal effort to change ourselves even a little bit, and I wouldn't be surprised if seeing this in you is part of why the person you love thinks you're wonderful.
Even if the person you used to be is someone you don't think they could love, that isn't who you are anymore. You're something else now, and they'll understand that even if they were to find out what you were before. They will not stop loving you.
[anon text]
Even if the person you used to be is someone you don't think they could love, that isn't who you are anymore. You're something else now, and they'll understand that even if they were to find out what you were before. They will not stop loving you.