Would I ever get him back?

You didn't say if he's in a relationship of any kind. I don't think he lost interest in you, its not easy to be intimate with someone and just loose interest the next day, he is just afraid of loosing his job and he thinks he is doing the right thing by not stringing you along. He knows that if you two are going to have a relationship then its going to be in secret, and that wouldn't be fair to you, so he put a stop to it for your sake. A pretty girl like you can find someone your own age quite easily and you can fall deep in love that someone in just the same way, but you have to decide what you want to do, do you want to take a chance and loose your job to be with him (because he's not going to give up his job for you) and have a chance that he leaves you for someone else, or accept his offer to be like his little sister and have someone there for you when you need them. He seems like someone you can talk to, so talk to him about this and let him help you decide.