You a junior, right?
There are some cool summer college programs which let you take college classes in HS as a part of a residential program (you live at the college). Surprisingly these programs are actually fun because you're only taking classes like 3-6 hours a day and the other time you just hang out with people and there's activities that the programs offer. I went to the University of Delaware program and really enjoyed it, but you should just go to one at a good public university in your state. I think mine cost about $2k for 5 weeks, but my parents somehow claimed a tax credit and maybe 30-50% of it was returned.