If you were able to decline Cornell, and aren’t accepted at your dream schools, is there an affordable safety? I.E. if you have to attend state school, is it as affordable as Cornell?
If not, there’s no way I would let go of a great deal on the tiny chance you might get another.
I can understand feeling railroaded into one option. My DD’19 felt that way when there was pretty much only one school that fit budget/major/other priorities and she didn’t want to go there. I felt bad for her but knew it had everything she wanted and needed so I didn’t let her dismiss it as an option. Eventually she decided to try to change her attitude. She visited a few times and had great visits. Loved talking to the professors she met. She looked through the course catalog and got excited about her options. She talked to alumni. She joined the FB and IG groups. She felt better, but she still wasn’t “all in” till she got there. Now she’s loving it and thriving.
Now that you are where you are, try some positive thinking and look for the good in Cornell.