Well heres what I think. First off, give yourself a pat on the back. You seemed to have raised a good independent smart girl. This is sopposed to be a happy time, she is going to college, yes you will miss her, and worry about her. We are mothers, thats our job to worry. But you need to look at the positives. She is going to college!!! Whoo hoo.

Well you could have a different situation, you could have a daughter like me, that decided to get married and have a baby, and not go to college, then realize later, that I have to go, and then its hard to be a wife, mother, college, and a job.
Or you could have the other situation, where your child has no motivation, and is living under your roof, no job, nothing, just wants to party.

So be happy. Hopefully the college is not to far away. Trust me she will be back, with dirty laundry, or something, so you will get to see her. And I don't know how your relationship is right now. But I have heard that it actually is better for mother/daughter relationships.