The best advice you can have is to start NOW to plan for the adulthood you want, where you can afford to buy an annual pass and hotel, food, as often as you like. That means college, trade school, or other means of securing a well-paying job. How are your grades? What classes are you taking? Activities? Service hours? Are you looking into scholarships, or have you planned for funding? At 15, NOW is the time to be working towards your goal. Not later.
Start investing in a Roth IRA now, too. You will not regret it when you're older.
I have a 4.3 something GPA right now Freshman year, do lots of extracurriculars, service hours, and I plan on taking lots of AP’s and applying for scholarships. I am right now (betting it’s going to change) planning to go to college to get my masters in nursing. As of right now, I want to be either a NICU or ICU nurse practitioner.