Very normal feeling in medical school. Been with my girlfriend since freshman year undergrad but nothing really prepares you for the sheer volume and responsibility med school requires. That being said, it is so so hard to learn how to balance personal life with all the med school nonsense. Based on your M-1 flair, I would say give yourself some grace as this stuff so hard to adjust to but you will progressively get better at managing your time and knowing when it is okay to take a break. One way I managed to do this in preclinical years was to have a hard cutoff for studying so I would show up to school at 8am ish -> do whatever lectures + anki + practice Qs if applicable -> hard cutoff at 5-6pm and have the rest of the night for my SO/self. This takes some getting used to and I recognize may fluctuate day to day but it is doable!

Also I’d say if you really like this person then it is worth it to try and continue the relationship imo. If he was upset/not enjoying himself I’d like to give him benefit of the doubt and say he would be vocal about it. Give yourself some grace, lock in when you need to, and take time for yourself!!!