**I think he might be moving into a different phase of his life...his career now. Its important to focus on that and not romance for the time being. **Thats what he is doing or maybe he has seen another girl he is interested in.
Whatever the case is, leave him alone and see how long it takes for him to come to you.
i really hate when people say that, love is not some sort of a job, its just protection and something to lean on when life hits you hard! Just becase you have a job/studies that does not mean that all of a sudden you become another person and don't have any emotion for others around you. I'm telling you girl when he is really ready, he'll be running after you! If he stays like this going around in circles, there is no need for you to have to deal with that!