let me preface this by saying im a sophmore in high school, who has never had a girlfriend before, nor kissed a girl.

theres a girl im trying to date, lets call her "jill". ive known jill for a year now, but didn't like her up until a couple weeks ago, and didn't really talk to her until a couple weeks ago as well. im pretty sure she thinks we're just friends, however, and I've also never talked to her in isolation...how do i escalate to the next level (besides kino i already know that...)