Should I be patient or put my foot down?

My boyfriend is an incredibly busy person. He is currently working twenty hour days on top of trying to complete a nursing program. Although I am very proud of him, I worry that he is not taking care of his health or anything else in his life so I have been trying to give him space and let him focus on his goals and have time to himself when ever he may have spare time (this means I’m lucky to talk to him once a week, at least, let alone spend time with him). I know what it’s like to be stressed out and very busy when someone is trying to spend time with you and how irritating it is when they become persistent or seem to not understand it’s nothing personal, you just don’t have the time. However, not getting to talk to him or see him still bothers me, regardless. My question is….should I talk to him about it even though I know he’s busy and if so, how should I go about it so I’m not being a pest….or should I continue to give him space and just wait this out and hope it’s for the better good…

I’m open to any suggestions that may alter the situation or help me to see this from a different point of view.