Hmm...
I do agree a lot with what PDM said, as in you may have given him the wrong idea many times when it seemed like you were trying to be careful. You should have let him explain, even though you were worried about what would be said.
It could be that he actually does want space, which is somewhat typical for a college age guy, and in that case it might be best to give him some time. But, it sounds like you're due for a phone call with him, and should explain what happened from your point of veiw. Ak him about the photo, because it seems to be the main problem. Tell him why you smiled (because if I were him, I would have thought you were smiling in relief to get rid of him), and that it was kind of a state of shock leading to tears afterwards (so it sounds).
Even if he still wants space, at least it'll feel like all the loose ends are tied up for the time being, and you might be able to try again later!
Just be open with him, that's the best thing to do. :3
