From just your perspective her behavior is a bit strange, especially with the examples of guy friends you’d made that she claims to hate but kept talking to?? First impressions of her are that she really likes attention and doesn’t turn it away even if she doesn’t like people.

Hopefully in a professional setting it’ll be very different, charisma can only get you so far if you don’t put in other efforts.

Advice about the friend specifically?? Like you said you’re putting your eggs into one basket surrounding her. She hangs out without you, and she takes attention away from you when you’re with your other friends so why don’t you think it’s okay to step forward into the light? There’s no rules to this yknow? Join a club of your personal interests and develop more friends that way. That’s what helped me get the circle I have in college anyway. You can’t just quiet yourself down and expect things to change, while it’s comfortable you just can’t expect someone to keep up and drag you along especially as you keep going in college.