School is something you can always come back to. Take a few months off to be with her, and then whatever happens, you can always go back to school and pick up where you left off.
Life is far too short to waste time with negative emotions. Your heart is telling you what you want, listen to it instead of your brain. Sometimes it's better to go with your gut rather than your mind.
If you stay in school and don't go see her, you will regret it for the rest of your life, even if she does survive.
If you go to see her, then you will at least have that time together. Even if she does not survive, you will have those fond memories to keep with you forever.
Don't make the mistake of missing out on this. You know what the right thing to do is, now be brave and take your chance! Go to her!
Make yourself happy and don't focus on making your lover happy. Your lover will be happy to see you happy. Allow them to make them-self happy so you can be happy seeing them happy. If they are not happy seeing you happy, or you are not happy seeing them happy, then it's time to leave each other and find that happiness elsewhere. Life is too short to bother with any other emotion for longer than absolutely necessary.
-Shela Aetherius