College, working and relationships.

I want to go back to college. I have a job where I work 9 or 10 to 5 at the latest. This job is to help me get back into college. I want to keep this job as a weekend job when I start school again, as they are very short staffed on weekends. And the time will not work for weekdays. And find a more flexible job for weekdays. I'll also have to fit in time for homework, and time for myself and time for my boyfriend. We live together, but I'm just honestly so scared we won't work out. He works 5 days a week 2-1am. I'll constantly be busy and probably won't ever see him.

I guess my question is, has anyone had a successful relationship while in a situation like this? I'm so deeply terrified of losing him and that's the last thing I want. And I don't want to give up on getting my dream career.