I know you say you won’t be 100% committed to the guy, but something tells me you are hoping for him to change his mind, most likely he won’t. If he finds a woman who is gf material to him tomorrow he would choose her over you. If you want to enjoy time with him, that’s fine. You should be aware in case you do catch feelings if he wanted to be with you he would. A man makes time for a relationship with a woman he really wants no matter how busy he is. Why waste time with someone who doesn’t value you from the start? Just ask yourself despite seeing other people if you are truly going to be okay if you end up falling and he leaves you at any moment. Good luck I wish you the best and with nursing school too :)