I have a huge friend crush on this guy! (and a little bit of a real crush too)

So, there is a very adorable guy that works at my favorite coffee shop and we talk ALL the time. We also go to the same college and I’ve ran into him a couple of times on campus. He’s sooooo saweeet. He keeps saying that he can’t wait until we see each other on campus and how we loves talking to me when I come in true shop. And honestly, I’m just trying to be his friend! At least, for the time being. So, my question is: how do you ask a guy on a platonic date?