My (20M) cousin (12F) just lost her father, and I want to be a positive influence in her life that she can trust if anything happens.

Hi,
Last night, my 12 year old cousin lost her father in a tragic incident. Now, my extended family is really close and i'm extremely disheartened to know that she will grow up without a father. When I was younger, her father always took care of me and was a really great influence when I was older as well. Recently, I had a private problem that I approached him about and he helped me get through it while being very supportive and positive while also respecting my privacy and not telling my parents, which I was extremely grateful for.
As for my cousin, I am the cousin of the closest age to her, and because of how much her father helped me when I was younger, I feel like I should also help his daughter as much as possible. I want to build a stronger relationship with her. We are already kind of close, but with her father out of her life, I would like her to feel that I am someone she can trust and approach about any issue or problem that she is having, and play a similar role in her life as her father played in mine. How do I make sure that I am perceived as someone she can trust and not just some overbearing older cousin?
Thanks!
TLDR: cousin's father died, how can I be involved in her life and how should I approach bonding with her?


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