<human>: My little sister just graduated highschool and is preparing to move about an hour away for college. Her boyfriend, who is going to be a sophomore in college, broke up with her unexpectedly (to her) yesterday.

They have dated for 3 years, and neither of them have ever dated anyone else. I have always had a feeling that things wouldn't last, because long distance at age 18 is nearly impossible (I was in the EXACT same situation at her age), but I kind of thought that they would at least stay together for the first few months of school before one of them broke it off. 

She is an emotional MESS. I feel so terrible for her, because I know how she feels, but I just don't know the best thing to say to get her through this. She is about to move into her dorm a few hours away from home, and although I think this break-up will ultimately be the best for both of them, I'm more concerned about her right now. Having dealt with this myself (most people do have a terrible breakup at some point in their teens), I know how awful she feels, and also that she doesn't realize that those feelings don't last forever.. I just can't figure out what to tell her. I'm much older than her, and know very well that it really does get better, but I remember how much I hated hearing that, because i did NOT fee like it would get better. Any advice I can give her?

Can you give me the gist of the text in a nutshell?
<bot>: Little sister and her boyfriend just broke up. She is a mess. What advice can I give her to help her get through this?