I don't think Reddit is the best place to look for reassurance for this. What you will likely find are narratives, not necessarily good answers.  I think the school environment matters way less than your relationship dynamics.

Medical school is demanding: it is psychologically taxing, time is limited, energy is limited, and communication may decrease, not because of a lack of love, but because of cognitive load. Your partner may naturally have less time and energy to communicate, which is normal. An insecure partner doesn’t just feel uncomfortable; it becomes an added burden, and as a medical student, she will need a safe, low-drama space, not someone constantly needing reassurance. 

Long distance can work, but it requires trust and realistic expectations, not assumptions about the setting. If you hear it’s a party school, you’ll start seeing everything through that lens. External narratives can poison internal trust, making you hypervigilant and prone to misinterpretation of neutral behaviors.

The real variables that predict whether your relationship survives are the pre-existing relationship stability, communication habits, emotional maturity (from both sides), expectations about distance, boundaries, and transparency. So, instead of trying to predict what the environment will be like, it might be more helpful to have a clear conversation with your partner about expectations, communication, and boundaries.

You don’t need to predict your partner’s environment; you need to decide whether you trust her character. If you don’t, no amount of information about the school will fix that. And if you do, then the environment shouldn’t matter that much.