Closed....You're both High School-aged teens. Your emotions are young and basically untried in relationship to truly understanding the various changes you're going through at this time. I'm a bit curious about your first statement describing your friend. Pansexual? This is interesting but raises a red flag you all seem to be unaware of.
"Having a crush on someone," (boy or girl) ~~ liking someone or being especially fond of a person, hardly means that sexual activities are automatically a given. We human beings, regardless of what you may think, simply do NOT want to have a sexual relationship (nor even an encounter) with every single person we find likeable or attractive!! This just isn't rational or sensible thinking. In fact, it's bizarre, unacceptable, unhealthy and outright dangerous to believe other wise!
I doubt you can do much to help your friend in this particular situation. Your friend needs to mature to a level of independent thinking in numerous areas of her life, as do all individuals in their teens. You may suggest at least that your friend confide in an adult whom she trusts~perhaps your school counselor.
Frankly, what is most important in your lives presently, is your education, your social growth and perhaps involvement in extra-curriculars that will help to form a well-rounded individual in adulthood. You have the rest of your life to make serious choices in terms of romantic partners.