What does it mean when a girl says she trust me?

Anonymous
I've become really close with this girl i've known for 2 years recently. Anyway we have spent time together with a group of people and time alone with each other like going to the movies and dinner etc. She said to in text that she trusts me the most out of everyone and she trusts me more than her ex boyfriend when they were together. She tells me I am an amazing person and that i'm the best with a smiley face and red heart. She also said to me that she is scared of losing me. She texts me everyday and asks how my day is going and what I'm doing, she sometimes texts me at 6:45am. We have been out at night when it's cold and she kept on mentioning she is cold and standing close to me to warm up; I didn't have a jacket so I cuddled her instead which she didn't move away.
What does it mean when a girl says she trust me?
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