What kind of bone cancer do you have? What treatments have you tried?
As someone who works in pediatric oncology and has also lost a teenage family member to a type of bone cancer, your post sparked my interest. Mostly because I must seriously applaud your medical team and your parents, because it's VERY unusual for a teenager to know he or she is dying months in advance. Usually, treatment is pursued way past the point of hoping for a cure with children. So for you to already know that you only have a few months left is pretty incredible and uncommon. It's very hard for parents AND doctors to reach the point where everyone is in agreement to stop treatment- kids are usually there much more quickly than any of the adults involved, but kids don't often get to make that decision.
I do have to say that while I am in agreement with others here that this question is likely untrue, this is something that has and does come up with teens who are dying. Adults have a hard time understanding how a teen's brain works (even if we have teens ourselves.) My job puts me in a position of having very frank, honest conversations with children about illness and death. Many of you wouldn't believe some of the things that come up in these conversations. Most teens I've worked with have not been overly concerned with virginity at the time of death, but many teens do mention it/realize it's something they will not be experiencing- it's usually on a list with other things, like traveling to specific places, college, driving, etc. There is not usually this much focus on it.
You said your other wish is to travel the world. Please be aware that Make-a-Wish will not be able to fulfill such a broad and big wish. If you have not had a Make-a-Wish yet, your medical team can put in a "rush wish" request. Depending on your local chapter, you may or may not be able to travel out of the country. You should speak to your child life specialist or social worker ASAP.