If a brother and sister love each other, you should be prepared to pay more than usual. If they love each other very much, it is still possible. As long as they are sincere, the success rate is still great. An affair is very important. It's really hard to manage your love life without being in a city. If you have any questions, you'd better ask her directly, tell her to let her solve the problems in your heart and see how she answers. There are problems that can be corrected, and it is best to correct them. Sometimes friends around you can see better than you, and you are just blinded by doubts. Of course, if the place can't meet your requirements and you feel too tired, you'd better give up.
Realistically speaking, it is difficult for women to get married when they are old. Men are not afraid. Middle-aged men are more attractive, but you are still a teenager. I really don't recommend you dating. It's good to be your big sister when you are your best friend. When she graduates from college, you will also go to college. There are some things you can ask her when you are in doubt. Since you like it very much, let's be friends. Don't tear your face. In the end, the couple didn't make it, and the friends also.
Why don't you suggest dating? First of all, you are brother and sister. There are few brother and sister relationships in this society now, which is abnormal. Of course, some people still have hobbies. For example, you like your big sister and she likes your little brother, so you walk together. Next, it is long-distance love. Brother-sister relationship is hard to accept, and long-distance love is even harder. You are studying, so she can't accompany you every day. To tell the truth, it will affect your study. You are reading. What do you think you will do? This will obviously delay your study. At present, the most important thing is your studies, so I suggest that your best relationship now is friends. If you really like each other, tell her that the most important thing for you now is your studies. If you really get along with someone, wait until you get into college. When you get to college, many things will be easy to say, because you are a high school student and there are too many factors that limit you.