“It’s hard to feel sorry for someone who fails to recognize the incredible opportunities she already has. I suggest rather than worrying about how you aren’t good enough for CMU, you think about how lucky you are to have won a bunch of awards and have two amazing college choices.”
At the risk of sounding like a broken record, that’s just not how the typical teenager’s mind work, things like gratitude, perspective, don’t start developing till mid-20s. Again this not to say every kid is like this, but that’s what the research shows. Well meaning advice is not going to help, like many well meaning anti-drug programs in the 80s and 90s made things worse. The OP is going to therapy, so there is some self-awareness which is good. But platitudes like get it over in a day or two is not going to work.