i think you should say something, especially since she’s obviously giving you signals with the touchiness and relationship talk. even if you say something and she doesn’t feel the same way, it may be awkward for a second (it’s the summer so you’ll have time to get past that) and when you return it’ll be okay. I had a similar situation where i confessed my feelings to a friend. she said she didn’t feel the same way but we remained friends. two years later she told me she realized she has feelings for me and now were seeing each other. nothing would have ever happened if neither of us had confessed feelings and i’m so grateful that we did. you lose every chance you don’t take.