Have you been noticing you guy acting weirdly these days, as if he's all of a sudden been cryin' for personal space! It's ok to be given personal space. But give a closer look at your relationship.
Is your guy these days talking about his single friends enjoying their bachelorhood, or is he been more than often planning out night outs with his friends. This could be a sign that he might be re-thinking about you two as a couple!