First, she may feel extremely inferior and want to make friends by showing off her wealth. Maybe something bad happened to her before, and her friends laughed at her because she had no money. Second, do you really care if she has money? The gift she gave you shows that she values you as a friend, but the way she makes friends is hypocritical and doesn't open her heart. You can talk to her alone and talk to her. If you treat others with your heart, she will open her heart to you.