You are very welcome. Thank you for your trust and openness here.
Please fully acknowledge all of your feelings, validate them, vent in healthy ways and then redirect your mind. heart and actions towards things/experiences that enable you to create and promote healthy, meaningful and fulfilling emotions and experiences, as well as to effectively cope with life challenges.
Then offer the same to your niece, be very compassionate and gentle, and time will allow her to see and distinguish between reality and illusions, and I know that your consistent healthy affection and caring will not vanish, but stay in her heart.
Please feel free to contact me if you have any further questions since I am here willing and ready to support you as much as possible.
You can contact me using this direct link to my profile https://www.justanswer.com/mental-health/expert-rafael-therapist/, you could bookmark it for easy access, and just make sure you state "For Rafael only" in your request, for other experts to know you want me to reply, and I will respond in less than an hour most of the time.
Also know that I do provide confidential counseling/psychotherapeutic support via Premium Services, which is implemented via Skype or phone call, in case you feel comfortable with me and would like to discuss in more detail this or any other concern, as well as the best approach to work on it.
Take gentle care,