I'm a single guy in my first semester of an ASN program (one more week!!). I've been pondering the same dilemma, though maybe a bit more generally. I have a lot of smart and attractive classmates, and with school killing my social life it's not likely I'll meet someone outside of school. I've been very tempted to ask out classmates, but the prospect of navigating a new relationship (or dealing with a break-up) when we'll be in an intensive program together for another year and a half is pretty scary. I think you are right to wait and see, and your reasons seem pretty obvious and reasonable to me. If he really likes you, he should respect your feelings and just get to know you.