Anyone with daughters in college? Advice?

My 18 year old is going off to college at U of Denver next month. Having a hard time dealing with her being so far away and outside my immediate control of emergencies and such. 12 hours drive means I get there after she needed me…

Really feel like a piece of my heart is getting ripped out, but trying not to let her see. Looking for any advice some of you may have that have gone before me, on how to deal with it. Any "check in at home" procedures you may have used that give you peace of mind without being a control freak to the child.

She is a strong, determined, mature, and a level headed girl, but also a boy magnet and very small. My mind runs away at all the terrible things a dad can imagine, and literally going insane here..