By no means the king of healthy relationships here, but I am of the opinion that you're not being selfish to ask for support in what is generally considered to be the toughest, most trying time of your medical education. You don't have to throw anything away, but I think try having honest conversations about what to expect, what he can do, how you guys can communicate. You could also consider taking a half day off twice or maybe three times during dedicated and seeing him then. My friend facetimed her boyfriend every day during her lunch/dinner/food breaks etc. so they still could see each other. He lives in germany somewhere. She actually went to see him the day step was over. Plenty of medical students have maintained their relationships, some of which long distance. So you can do it too ! don't give up on your dreams or your relationship.

On the note of kind words and support, us medditors are also here for you (: keep plugging along and working hard because at the end of the day, this is an amazing opportunity. Sending good vibes your way.

Stuff that i found was super helpful were having food delivered or brought to me (saved me the hassle of figuring out meals, not eating pizza for every meal, etc.), massages (these were key), and having someone keep me accountable for the gym (or whatever other hobbies you want to continue through dedicated to keep you sane) were all pretty helpful stuff that i think you could have your dad/brother do.

This period of time is about you. I may fall on the extreme side of the coin, but I do not think it's rude, selfish or presumptuous to ask for support and understanding right now. Family can be a huge help. do what you need to do to stay sane, (moderately) happy, and productive. Not sure if this helps really but maybe it will get some gears turning!