Well, of he intends to go back anytime soon then he made the right choice. Imagine him starting a relationship then leaving you behind when he moved.
Or what if he had started a relationship then shortly after moved and wanted you to go. Leave your life behind to go off to the mountains with someone you've barely started a relationship with.
And he didn't reject You. He already has plans and goals for his life, and those plans don't include another. Some are gifted with singleness. He may be one.
We never know why some have to wait, or others never find anyone or settle on someone. Yet others marry young.
I do know that if I'd married younger there's a high chance of my being divorced now, as opposed to if I we're to marry now I jnow there is a real chance of it lasting now.
Waiting sucks, I know, I'm 42 and never married, but waiting also gives you a better chance at lasting.