Hey, I am sorry you went through that. I have been through breakup, I understand what you are going through.
I would suggest you to atleast confess to him. You never know what he thinks about you!
But yeah, know that there's a strong chance he won't leave that opportunity for you (he shouldn't ideally) but you both can make long distance work.
I can't say what the future holds for you if you both decide on what you want and where you want to live, you should talk it out probably.
All the best!
P.S - yes, a lot of people don't come back after MS, but he could be an exception especially if he feels strongly about you. You wouldn't know this unless you express yourself