My brother met a girl just before basic training. He said the same thing. Then, when he came back from one of his tours they met again. They are now married with 4 kids. They've been married for over 20 years.
If you're up for it you can show your commitment by waiting for him. Stay in touch and even after if you have to stay good friends. He'll come around if he sees you trying.
he's not interested in what you want or need. Think yourself lucky it's finished now and not with more time under your belt.
Well, it seems to me like his mind is made up. But if you want to pursue him, the only way to do so is to enlist. I can't recommend that as a good idea though.
He broke up with you, why do you still call him your boyfriend ? He is your ex.