I'm pre-med (nowhere near where you are lol) and my fiancé (23M, making 160k) covers the majority and I the remainder. I'm also a veteran so my income is roughly around yours with college benefits. Not once has he mentioned me "paying him back".

I guess what I'm trying to say is that a relationship isn't a quid pro quo. It's supposed to be a team that helps the other grow. While he was in school for his masters, I held down the house and did the odd chores. Whenever I had busy school days, he'd pick up the slack.

You have a lot ahead of you, and you're going to go far in Pathology! You got yourself here, you don't need someone to take advantage of you.