I can relate to what you mean about living up to expectations being very difficult. I've become almost defensive when people try to compliment me or tell me everything is going to work out because I did xxx internship and have xxx experience. The world doesn't work that way, nothing is guaranteed! I get rejections all the time! So these emphatic assurances from other people really get on my nerves.
That being said, it looks like you got into UC Davis and Riverside, which are both very good schools so I agree you should focus on what you have instead of what you don't.