I wouldn’t follow him. If you love him enough, then let him visit when he’s on leave.
I definitely wouldn’t throw away your business for him at all.
I think you need to ask him why he thought this would be ok and why he’s taken such a drastic change without considering you and maybe take it from there although I’m not sure what a good reason would be and perhaps maybe it’s a sign you’re both going separate ways in life.
You will end up resenting him if you give up everything you have. You should stay put and have him visit you when he can. But there no way you will be happy if you give up everything you’ve built for him.