Feeling like I just wasted my whole summer

Basically I liked this girl for well over a year and she was a good friend of mine, I finally got the courage to ask her to prom and she said yeah and then two weeks after I finally worked up to ask her on a date and she said she would love too I took her out I spent time with her met her family, and even was “forced” to slow dance with her on her birthday in front of her whole family. I thought everything was going great until the messages started taking longer, and the inconsistency kept rising, and then I finally today decided I need to know where I stand and she plans today at two then it turns after 3 and then she says sorry I got called into my other job and then I finally decided to just ask her on the phone because I’m leaving for college in now less than a week. And I ask I want to know what are we? And she says I’m sorry that I made you think that we were becoming more than friends I said yes to going out on a date because I wanted to see where it leads and I have a great time with you and I enjoy hanging out with you but right now it’s just not going to work because she is going into a trade and is working all the time and having a relationship would just be a distraction. And then she goes on to say I’m sorry I don’t mean to hurt you and I still want to stay in contact and be friends and definitely still hang out when I’m back. And then she says I know your a great guy and I really appreciate all you done for me ( she had a bad knee injury and while we were friends I was always there to help and check on her) and I know you haven’t done anything to hurt me but I’m just at a point right now where I don’t have the time for a relationship. So now after sitting in the car holding the roses I was planning on giving her today I walk and throw them out and drive home and now have to act like nothing just happened even though I really just want to sit in a corner and cry.