These things happen. I'm maybe not the best person to weight in on the situation, seeing as I seem to do this lots, but.
So you've done it. It's done, it's over. You'll learn to deal with it in your way, he'll learn to deal with it. The rockiness of it all sort of smooths out quicker than you'd expect, really, and I think perhaps you can take away a valuable lesson from all this. That is: attachments are amazing and great and wonderful, but dangerously tricky at the best of times.