It sounds like he quite possibly became attached. Men have emotions just like women. The only difference is the way in which they process and express them. My experience is that men need to fulfill their need for autonomy. It's easy to get caught up in the moment with a wonderful person and forget who you are as an individual. My advice to you is to stay calm and wait it out. Do not chase him!!! He will only want to withdraw the more you pursue. It's their nature to like the chase. I use to drive myself insane (I still do from time to time) trying to figure out 'why this', 'Why that' or 'was it something I said?' Stop focusing on him. Turn to activities you enjoy and he will seek you out. Men respond quicker to actions rather than to words. If it turns out that he doesn't make an effort to contact you, then at least you didn't text or call him with the dreaded question, " Did I do or say something to push you away?"
I wish I had someone when I was younger to give me this advice before getting my heart broken countless times. Be mysterious. Let him wonder where he stands with you. Right now, he's behind the driver's seat. Take control. You can do it. I sure hope it works out. You are a prize and worth it!