@celloplayer99, you sound just like my son except that we totally support his decision to pursue a cello performance major since cello is really the only thing left for him in his mind. He’s been playing for 15 years, he took a gap year, but then withdrew from his college (was pursuing other majors) and finally, at age 21, has decided to pursue cello. We’ll see if it really happens.
One thing you could do is reach out to the cello professors at the schools that you really want to attend, send them a solo performance, and get feedback from them as far as 1) if they will have openings in their studios next fall, and 2) if they think you might be competitive for an audition.
My son did this with a number of schools and got some very positive feedback which helped shape his list.
Keep us posted and let us know what your teacher and parents think.