I really like this girl in my grade, she's actually really funny and she's extremely gorgeous. I've only had one class with Her before, just last semester b4 summer. I just recently got introduced and hangout with her brother who's a year older than us and we have a ton of mutual friends. I bet he will find out I like her soon enough and he's been a little repulsive towards me as I was not invited to his grad party by him but her. Any advice on how I can flirt with her and become better friends with them both?