I happened to meet (well, re-meet, we went to high school together) my current boyfriend about 2 months prior to starting nursing school
last summer. I had gotten used to a pretty lax schedule, with only my 9-5 job in the picture at the time. I mentioned several times on our first couple of dates, "In a few months, I'm going to be working full time and going to nursing school. I have no idea what that's going to be like". However, despite the hectic schedule, we've grown quite close, and just have to be more intentional about setting aside time together than some other couples might. I think it helps that's he's really attracted to my ambition and my work ethic, so he fully supports when I just need time for school from time to time. Sometimes he even looks out for me when I kind of want to blow-off study time, and he'll say "Well, you have that big test next week, just power through!" We just celebrated our 1 year anniversary, and things are going really well. Although, he's already made one "deal" to balance things out once I'm done. He's a teacher, who has summers off, so he's told me I need to become a school nurse so we can have summers off together to make up for lost time
It may not be for everyone, but if you meet someone great, and you both know the reality of your hectic and demanding schedule and are willing to work with it, a healthy dating relationship is possible.